Conda

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* fix "executable" not being found on Windows when ending with .bat when
launching application
* give a better error message from when a repository does not exist

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* allow ${PREFIX} in app_entry
* add binstar upload information after conda build finishes

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* add global conda lock file for only allowing one instance of conda
to run at the same time
* add conda skeleton command to create recipes from PyPI
* add ability to run post-link and pre-unlink script

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* add ability to build conda packages from "recipes", using the conda build
command, for some examples, see:
https://github.com/ContinuumIO/conda-recipes
* fixed bug in conda install --force
* conda update command no longer uses anaconda as default package name
* add proxy support
* added application API to conda.api module
* add -c/--channel and --override-channels flags (issue 121).
* add default and system meta-channels, for use in .condarc and with -c
(issue 122).
* fixed ability to install ipython=0.13.0 (issue 130)

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* update package command to reflect changes in repodata
* fixed refactoring bugs in share/clone
* warn when anaconda processes are running on install in Windows (should
fix most permissions errors on Windows)

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* conda with no arguments now prints help text (issue 111)
* don't allow removing conda from root environment
* conda update python does no longer update to Python 3, also ensure that
conda itself is always installed into the root environment (issue 110)