Allow uppercase letters in ladspa file names

Per #1041

Tested against unfa-spoken.mmpz (uses dozens of LADSPA effects).
Merge pull request #1046 from tresf/patch-2

Allow uppercase letters in ladspa file names
Fix autodetect of midicontroller
Fix #999
Merge pull request #1060 from diizy/midifix

Fix autodetect of midicontroller
Merge pull request #1061 from LMMS/stable-1.1

sync