[WIP] Proteus on HashStack
Add doxygen package
doxygen: use latest git version

This is due to the fact, that the --prefix option to configure was only added
after the latest release 1.8.6 was out:

https://github.com/doxygen/doxygen/commit/bc7e6301e2d1474592f6cd6cc07624852d1b5016
doxygen: add the Bison dependency
Update PCRE, enable more options
Merge pull request #202 from hashdist/pcre

Update PCRE, enable more options
Merge pull request #200 from hashdist/doxygen

Doxygen
Update IPython from 1.1 to 2.0
Merge pull request #209 from hashdist/ipython_bump

Update IPython from 1.1 to 2.0
Merge pull request #144 from hashdist/ahmadia/add_proteus

[WIP] Proteus on HashStack
Tighten Proteus install

* Use setuptools externally-managed install to properly isolate install
  from Python
* Clean up egg files
* add needed setuptools.yaml package description
Merge pull request #212 from hashdist/ahmadia/fix_proteus

Tighten Proteus install
Update matplotlib to version 1.3.1.

I added a licence field as discussed in
https://groups.google.com/forum/#!topic/hashdist/aJQkqm9hZZw