Integrated 'babel' with testament
added a warning for htmlgen
Removed babel package tests from those run when 'all' is specified.
Allowed specification of what babel packages to install via new categories - 'babel-core', 'babel-extra', and 'babel-all'
Merge pull request #970 from Varriount/testament/babel-integration

Integrated 'babel' with testament
Fix categories.nim
don't produce nested indents for nested stmt lists
removed dead code
fixes #968
Changed behavior when babel cannot be found/run

Failure to find and run babel when using the tester now produces a warning message instead of causing the tester to quit.
Merge branch 'devel' of https://github.com/Araq/Nimrod into devel
failing test case for static evaluation