Squashed 'sglib/' changes from 4e27f3d..ca76419

ca76419 Fixed a problem in munit with resetting the working dir and with debug printing.

git-subtree-dir: sglib
git-subtree-split: ca76419951a82c09ffac561a0f11d04f26f22e6b
Merge commit 'b5719da46479f39fbde0b2f3f115012dda0f03d0'
added bin directory
Added sglib-subree command (for committing to sglib from dependent projects)