Squashed 'moose-core/' changes from bd86fb5..3f8c345

3f8c345 Make sure all python scripts are python3 compatible. BhallaLab/moose#202.
937fdf4 Allow failure with clang compiler. python-libsbml module doest not get build with clang.
b7f1834 Merge commit '1680bac6'
d28a94d Changes to cmake file so that we can find the correct static library.
67c0d52 Fix a development warning in cmake.
9bb0aa9 Removing shebangs from the python scripts. These scripts were never called as standalone executables.
3b2296b A test commit to package hdf5-devel BhallaLab/moose#201.
06adf59 Fixed another typo in FindGSL. Library list was converted to string.
3893081 Fixed a typo in FindGSL file.
b635a2c FindGSL also looks for GSL_VERSION now.
6bcc61d Fixes to travis failure.
88d49cb Updated CMake and FindGSL.
0fb10a5 Fixes to extension bug.
a9b9f2a Some fixes to static library dependencies [skip ci]
6614991 Cleanup in cmake files. Using bash scripts to generate subprojects. This way I can handle enviro...