disabled all backends on Cairo
Correct nm set for ipython and shapely packages, fixed mac issue with -shared for numpy
Merge branch 'lesser_pip_no_distribute'
Good name for shapely
Merge branch 'lesser_pip_no_distribute' into devel
Revert "Merge branch 'NoVist'"

This reverts commit 16c4bf4247b719d9bbb3acf130c7a9b53ad03b98, reversing
changes made to 9398502484f0ce1e069a860bee1f128d2bbf01c1.
pixman also icks up gtk, disabling
Merge branch 'issue_345_bare_bones_cairo' into devel
PYTHONUSERBASE is now CMAKE_INSTALL_PREFIX installing in Externals led to subsequent packages not finding pip installed modules, because PYTHONPATH not set properly. And it didn't make sense to spread the python packages in so many places
Fixed issue where pytable wouldn't find numexpr because pip was using a 'weird' pythonuserbase var
Merge branch 'devel' into metrics