ref #129 change camera preset keyboard hotkeys
add camera preset for random view on objects
add camera preset for bottom left view on objects
merge camera presets
invert mouse wheel navigation
fixes #93
revert commit 5b94999, avoid conflict with #130
merge new master into navigation devel branch, ref #137
change to 4 spaces standard
merge master in navigation develop
Update .gitignore
Fix fps navigation wasd-movement, fix #150
Remove redundant methods in fpsnavigation, ref #150
Fix default navigation frontview after switching manipulator, ref #136
merge master into navigation develop branch, ref #153
Merge pull request #153 from hpicgs/navigation/dev

Navigation fixes and improvements #153