Merge pull request #113 from tzz/master

sys: add info about new major, minor, patch version variables
Include stdlib sections
Include all sections
Trying to fix suspicious Liquid exception
Liquid problem fixed in source file

Nice to be able to use liquid expressions, but should probably be escaped somehow
by pre-processing scripts...
Quick introduction and style fixes
Generate function docs from syntax map
reference/classes: add xrefs and try to explain 5-minute intervals.  Reduce redundancy.