TVB-988
Review the code produced for GSOC 2014.
Reduce number of callbacks.
Improve GUI to better fit TVB style.

git-svn-id: https://repo.thevirtualbrain.org/svn/tvb/trunk/scientific_library@6496 1c0e02f0-7929-43c0-8fb3-3293bf43b0d1
Demos: remove line that overwrites the seeg sensors with an empty datatype in seeg region demo

git-svn-id: https://repo.thevirtualbrain.org/svn/tvb/trunk/scientific_library@6504 1c0e02f0-7929-43c0-8fb3-3293bf43b0d1
TVB-1569 Fixed surface splitting when few vertices have to be split

git-svn-id: https://repo.thevirtualbrain.org/svn/tvb/trunk/scientific_library@6506 1c0e02f0-7929-43c0-8fb3-3293bf43b0d1
Small cleanup.

git-svn-id: https://repo.thevirtualbrain.org/svn/tvb/trunk/scientific_library@6516 1c0e02f0-7929-43c0-8fb3-3293bf43b0d1
Merge branch 'trunk' of https://github.com/the-virtual-brain/tvb-library into trunk