Enstaller

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* improved creation time of index-depend by adding mtime
* fixed: enpkg now doesn't crash if a local repository contains invalid eggs
* add --info option to enpkg
* update to use the latest version of the official implementation of PEP 386
* add print of "up-to-date message" when nothing was installed when running
enpkg
* add --whats-new option to enpkg

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* added uncommented GPL-eggs repo to default configuration file

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* Cleanup

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* Added --noapp (no application) option to egginst
* Added ability to specify the proxy string in .enstaller4rc
* Added optional noapp variable to .enstaller4rc
* Changed to use username and password authentication

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* PKG-INFO file is now placed in site-packages as
<name>-<version>-py<major>.<minor>.egg-info
* removed unused enstaller.indexed_repo.platforms module
* allowing a placeholder '{ARCH}' in the list of indexed repositories
in the configuration file which gets substituted by 'amd64' or 'x86',
depending on the architecture of the current interpreter.
This allows having a single configuration file on systems which have
more than one interpreter installed.
* added ability to handle release candidate versions

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* fixed development versions being sorted incorrectly
* improved to use normalized path in MachO headers