Enstaller

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* fixed enpkg bootstrapping problem

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* removed the setuptools patch
* added more tests and documentation
* added enpkg --proxy option which uses the proxy package from ensetuptools
* added egginst --prefix option to specify install prefix
* added ability to create a self-installing Enstaller egg, i.e. it is possible
to execute the Enstaller if bash is installed.
* removed experimental egginst --activate and --deactivate options
* added enpkg --prefix and --sys-prefix option
* changed location of system config path to <sys.prefix>/.enstaller4rc

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* replacing enpkg by new-enpkg which uses egginst. The old (Enstaller v3)
enpkg command is still available and now called easy_manage, because it
can manage setuptools installed packages.


All earlier versions
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All earlier versions of Enstaller used a completely different architecture
and design and were quickly deprecated from active usage due to instability
problems.