Update .gitattributes

Added some gitattributes to get GitHub's linguist to support Simba's script files.
Fix: AverageExtended (Init Result-variable)
Merge pull request #327 from WarPie/master

Fix: AverageExtended (Init Result-variable)
Merge branch 'master' of https://github.com/MerlijnWajer/Simba into disguise