Conda-build

--------------------
* fix source/path and GIT_* issues, 801
* fix invalid assertion, 855
* environ.py refactor/clenup, 856
* Better messaging for yaml parsing errors, 862
* fix typo, 863
* make CONDA_PY and CONDA_NPY available in build.sh, 837
* execute source fetchers (e.g., git, hg) in the _build environment, 843
* use memory map rather than read() to reduce memory usage, 866
* fix svn url on Windows in checkout tool test, 867
* fix empty files bug, 869
* improve Visual Studio logic, 861
* add files in order of increasing size to improve access times to tar, 870
* VS_YEAR, VS_VERSION, VS_MAJOR and CMAKE_GENERATOR environment variables, 872

--------------------
* support for Lua as a built-in language (Alex Wiltschko), 719
* allow additional keys in "about" section, 831
* fix Examples directory in noarch_python, 838
* revert OS X SIP fix, part of 808, 844
* fixed race condition between removal and creation of tmp_dir on win, 847

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* silence some errors when subprocessing git 790
* fixes conda skeleton cran under python3 817
* fixes some bugs introduced with the 808 otools refactor, 821, 825
* fixes 818 conda-build 1.19.1 breaks C compilation, 825
* actually fix 807 recurisive builds after conda 4.0 release, 826
* fixes 820 crash when building from a git repo on Windows, 824

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* Environment variables defined in the 'script_env' build section of
the meta.yaml file were previously assigned the value '<UNDEFINED>'
if not found in the environment. Now they are left unset and a
warning is raised instead, 763.
* fix printing of NumPy 1.10 in help message, 776
* add -m32 to CFLAGS and CXXFLAGS for multilib gcc, 775
* fixes CYGWIN_PREFIX for drive letters other than C:, 788
* fixes for noarch package building on Windows, 799
* work-arounds for System Integrity Protection on OS X El Capitan, 808
* fix recurisive builds after conda 4.0 release, 813

--------------------
* normalize unicode in conda skeleton cran, 681
* use /bin/sh on openbsd, 707
* fail early during patching
* use symlinks=True in copytree() for SVN sources, 665
* support entry points with dots (to suppoer classes), 690
* deprecate conda pipbuild in favor of conda skeleton. 710
* fix Win references to PipBuild scripts, 723
* allow git shallow clones, 604
* remove broken license file detection code, about/license_file
expects filename now
* allow pinning dependencies when building a package, 741
* fix to restore building for multiple python versions on Windows, 744
* fix building (git unrelated things) when git is not installed, 745
* enable tab completion for the packages argument of the conda inspect
commands, 748

--------------------
* move path prepending to function for uniformity, 601
* improve yaml loading, 603
* allow jinja2 templates to be located in current conda environment, 578
* fix NPY_VER for versions >= 1.10 (Should be '1.10', not '1.1.0'), 660
* create jinja2 environment with 'strict' mode for undefined values, 661
* add a method to shell out and execute a command through subprocess, 621