empty iterables should remove templates references, added test to check this
added test files with nested templates
rewrote format test function to give more detailed output
fixed FormatTest return value
allowed comments in (not in Template) starting with '#'
made end-of-line comments possible on block breaks
fixed error with comments in GUIDE block
made debug output of failure more helpfull
fixed FormatTest to handle comments inline with block breaks
set up load iters to handle inline comments in iterables
set up load refs to handle inline comments with references
added test files for checking comment processing
Merge branch 'feature/Comments' into develop
comments can be included in templates, preceded by '#'s