Windows doesn't have SIGQUIT
splitdebug.sh
new file:   dev-notes/contributors-update-hook-for-cia
don't request additional backlog for temp hidden buffers

When using the PerBufferUnreadBacklogRequester, don't fetch additional
backlog for temporarily hidden buffers.
new file:   tx-sync.sh
von wegen unused…

Partly reverts 'b3cf44aa5773bb6a6e0a1ba8d0c1add841281b4b'
tx-sync.sh: fix for dumb terminal mode
BufferWidget: Remove minimumSize constraint
Travis: Update gcc to 4.7

Fixes Travis builds currently failing with:
  cc1plus: error: unrecognized command line option ‘-std=c++11’
Merge branch 'nobrackets' into frickel