fixes #1646
Merge branch 'devel' of https://github.com/Araq/Nimrod into devel
renamed CondVar to Semaphore
proper fix for stack initialization and threadvar emulation
fixes #1560
fixes #1593
fixes #1473
fixes a regression that made 'system.compiles' output the produced error messages
fixes #1127
Add csources to gitignore

This will keep the git status output cleaner.
The .gitignore will not cause already tracked files to be deleted