fix parser for 64 bit ints

fix build for switch

Merge pull request #7 from evolutional/docs/gdnet-articles

Merge pull request #4 from evolutional/switch

docs: added second tutorial article

docs: intro to gm converted to markdown

update readme

Update docs clarify C++ not C

Added support for 'switch' statements with C/C++ like fall-through to the next compound statement.

Merge pull request #3 from evolutional/gmerror-fix

Fix compile error under VS2017 (/Zc:strictStrings)

Update readme.

Revise FAQ doc a little

fix fall through case

Fix foreach