Squashed 'sglib/' changes from 6e6455c..0ec7b66

0ec7b66 Deleted testing subdirectory
1ffeb30 Fixed a bug in sglib-subtree
6772c18 Added sglib-subree command (for committing to sglib from dependent projects)
15d6dbe added bin directory
ca76419 Fixed a problem in munit with resetting the working dir and with debug printing.
4e27f3d FIX added gpcbasis_evaluate that I forgot to add in when renaming the methods!!
bc1d2ba Deleted demo directory

git-subtree-dir: sglib
git-subtree-split: 0ec7b66ac9101f952c3b2d16c396450714fed02c
Merge commit '81cf977ace4be1d1720e6c3fec325b6141a1e998'