Conda-build

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* add support for signing packages, and indexing them, 430
* removing LIBRARY_PATH and INCLUDE_PATH build environment variables on
Unix, they where originally added in 228, but are causing problem for
some people and are not really necessary
* don't rename meta.yaml to meta.yaml.orig in the recipe that is copied into
built packages
* handle links to libraries that exist in multiple places better on OS X
* add --no-remove option to conda index
* various fixes for --python, --numpy, --perl, and --R
* various cleanups for the command documentation
* fix conda skeleton pypi --pypi-url
* don't add the module name to the import tests in conda skeleton pypi
* add --groupby option to conda inspect linkages
* fix some incorrect "not found" instances from conda inspect linkages on OS
X
* don't include versions with restrictions in the build string
* don't fail if conda-build cannot be found for the version check
* remove special logic if the username on Windows is "builder"
* conda skeleton pypi: add --noarch-python
* fix issue with filenames with spaces in conda convert
* place noarch packages in the noarch directory
* handle tests_require in conda skeleton pypi
* pipbuild: don't check if package already exists
* skeleton pypi: remove --no-download option
* add noarch option to pipbuild
* add ability to sign packages

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* skeleton pypi: fail better for packages with bad urls
* fix summary in bdist_conda
* fix compiling pyc files in Python 3
* convert: correctly set the subdir key in the metadata
* add --git-tag to skeleton cran
* include LANG in the build environment
* export proxy environment variables
* fix conda skeleton cran --cran-url
* set CONDA_DEFAULT_ENV in the build environment
* fix conda index -c
* correctly extract .tar.Z files
* avoid infinite loops in conda skeleton pypi --recursive
* add --all to conda inspect linkages and conda inspect objects
* add --manual-url to skeleton pypi
* fix issue where 'conda index' with old packages would create bad metadata
* resolve circular dependencies in conda-skeleton (409)
* use versioneer 0.14 (385)
* always_include_files errors out (exits) on files that aren't there (387)
* automatically lowercase the package name in bdist_conda (see
aplpy/aplpy259)

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* fix regression in always_include_files that causes build failure (386)

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* correctly fix egg directories that are part of the package
* use the --force-rpath flag to patchelf
* update MACOSX_DEPLOYMENT_TARGET to 10.6
* fix running tests for Python packages whose version differs from the
version in conda
* fix some Python 3 issues with pipbuild
* don't allow packages to depend on themselves
* allow to use the r- prefix in conda skeleton cran
* make recommended r packages depend on r-base in skeleton cran
* new post-build logic on OS X. All libraries on OS X now include LC_RPATH,
which points to the environment lib directory, and use and install name
using rpath
* don't set DYLD_FALLBACK_LIBRARY_PATH in cran recipes (the new LC_RPATH
logic on OS X makes this unnecessary)
* fix conda build --build-only when the long build prefix is used
* make conda inspect linkages work on OS X
* don't hide the traceback for maximum recursion depth exceeded errors
* add conda inspect objects, for inspecting object files in packages
(OS X only)
* add --untracked flag to conda inspect linkages
* build R packages against a specific version of R
* decompress .tar.z files
* add support for GitHub urls in conda skeleton cran

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* add 'script_env' key in build section of meta.yaml file, which is a list
of environment variable names which are made available in the build
script. If a variable is listed here, but is not in the environment,
the value '<UNDEFINED>' is assigned.
* Handle OSError in conda index
* Fix how the PATH environment variable is set on Windows
* Remove the work directory earlier in the build
* Give a helpful error message for dependencies like "python >= 2.7"
* Add CYGWIN_PREFIX environment variable on Windows
* Handle list requires in skeleton pypi
* Correctly fail if the Windows bld.bat exits 1
* Give a better error message if no urls can be found for a package
* Add __main__ to allow python -m conda_build
* %R% is now set to R.exe instead of R.bat on Windows
* Write the build script to the source directory for build/script instead of
the recipe directory.
* Handle non-directories in copy_into (avoids an OSError, 332)
* Halt the build on YAML error without jinja2
* Clone git sources with the --recursive option
* Add --channel and --override-channels to conda build. -c is changed to
mean --channel instead of --check.
* Add --check-md5 flag to conda index
* Look for vcvarsall.bat from the Microsoft Visual C++ Compiler for Python 2.7
* Use PyPi XMLRCP client search in order to ignore case for PyPi package
names in pipbuild

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* don't set the GIT_* environment variables when the source is not a git repo
* skeleton cran: add extra metadata from CRAN to the recipe
* skeleton pypi: fix there not being a fragment in a url
* don't match comment only lines as selectors