Update eigen to 3.2.1
Merge pull request #379 from hashdist/eigen

Update eigen to 3.2.1
Update QT to 4.8.6

The current version can't be downloaded any more:

Downloading http://download.qt-project.org/official_releases/qt/4.8/4.8.5/qt-everywhere-opensource-src-4.8.5.tar.gz...
[ERROR] urllib failed to download (code: 404): http://download.qt-project.org/official_releases/qt/4.8/4.8.5/qt-everywhere-opensource-src-4.8.5.tar.gz

And the new version 5.3.1 doesn't compile with the current build script.
Qt: Use more permanent URL

Per @ahmadia's suggestion. I checked the hash, it did not change.
Make Qt non-relocatable
Merge pull request #381 from hashdist/qt

Update QT to 4.8.6
Add initial support for building piranha's python bindings.
Merge branch 'piranha_cleanup' of github.com:bluescarni/hashstack into piranha_cleanup