Conda

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* fix rm_egg_dirs so that the .egg_info file can be a zip file
* improve integration with pip
* conda list now shows pip installed packages
* conda install will try to install via "pip install" if no
conda package is available (unless --no-pip is provided)
* conda build has a new --build-recipe option which
will create a recipe (stored in <root>/conda-recipes) from pypi
then build a conda package (and install it)
* pip list and pip install only happen if pip is installed
* enhance the locking mechanism so that conda can call itself in the same
process.

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* ensure lowercase name when generating package info, fixed issue 329
* on Windows, handle the .nonadmin files

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* update bundle format
* fix bug when displaying packages to be downloaded (thanks Crystal)

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* add --index-cache option to clean command, see issue 321
* use RPATH (instead of RUNPATH) when building packages on Linux

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* add --no-prompt option to conda skeleton pypi
* add create_default_packages to condarc (and --no-default-packages option
to create command)

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* added user/root mode and ability to soft-link across filesystems
* added create --clone option for copying local environments
* fixed behavior when installing into an environment which does not
exist yet, i.e. an error occurs
* fixed install --no-deps option
* added --export option to list command
* allow building of packages in "user mode"
* regular environment locations now used for build and test
* add ability to disallow specification names
* add ability to read help messages from a file when install location is RO
* restore backwards compatibility of share/clone for conda-api
* add new conda bundle command and format
* pass ARCH environment variable to build scripts
* added progress bar to source download for conda build, issue 230
* added ability to use url instead of local file to conda install --file
and conda create --file options