Update lexers to support double-quoted strings

Included with simba: SynHighlighterPas, modified and named
SynHighlighterLape.
Needed to support some changes I made to Lape.
Merge pull request #314 from WarPie/master

Update lexers to support double-quoted strings
Merge pull request #318 from MerlijnWajer/master

Updating simba-next with code submited to master