Undo requiring krono's special filetree

This was used only by @SWTI2014 and erroneously ended up in #59
Merge pull request #61 from krono/master

Undo requiring krono's special filetree...
ping travis
First try to enable screenshots during tests
Add dependencies
Re-enable Squeak 4.4/Trunk
Use http://www.mirandabanda.org/files/Cog/VM/VM.r2776/
Merge branch 'dev'
Upload screenshots to imgur.com
Revert "Use http://www.mirandabanda.org/files/Cog/VM/VM.r2776/"

This reverts commit 6b67f9931fb527f5d83133a8524ee04f4556e410.
Add libsm6:i386, libuuid1:i386 and libc6:i386
Fix bug
Use imgur API v3
Fix screenshot upload
Move dependencies
Use env variable for turning screenshots on/off
Fix env variable usage
Rename env variable
Re-enable all build envs
Move before_install scripts to build_client.sh