added more function definitions, added small hack to make randomWalk and countLine that do not take any series work with the parser and target editor (the whole target editor and parsing & back to target rendering needs to be rewritten to handle functions that take multiple series)

Fixing download link in README

Conflicts:
	src/app/panels/graphite/module.html

fix: row height is not set on persisted panel when entering fullscreen mode, prevents height from being saved if saving when in fullscreen mode