Parser and lua blocks

[Bart Bogaerts]

• When } occurs in a Lua-string, it is matched to the previous {. Thus, it ends the lua block. We don't want this...
• When :: occurs somewhere in Lua (also for example in a string), it is replaced by "." We don't want this either

[Broes De Cat]

Fixes #143: corrected parser for strings and chars in lua.

→ eee28b3d588f