add: docu. for load(<string>,"with")
add: initial stuff for apply

from master
fix: multi-index for bigintmat
variable folders in desktop files (using @datadir@ etc.)
add: missing interpreter features from master

(multi-index for bigintmat etc.)
chg: staticdemo: demo of a statically linked C-module
Merge pull request #335 from mschulze/spielwiese

variable folders in desktop files (using @datadir@ etc.)