Added E2 constants to E2 helper
Added E2 constants to E2 helper

Added entries for E2 constants to the E2 helper

- descriptions and tooltips are not (yet) supported
- searching works for name and returntype
- entries are added as functions, arguments and cost are empty
- returntype is the type of the constant, taken from type(...) of the constant's value
- functions are added after the constants

Grocel/wire,NezzKryptic/Wire,dvdvideo1234/wire,sammyt291/wire,garrysmodlua/wire,wiremod/wire