forceRedrawVimView called after exiting full screen

Fixes rendering issue in upper part of vim view after entering full
screen, toggling status bar then exiting full screen
moved forceRedrwaVimView call to delegate method
Merge pull request #126 from niklasberglund/develop

forceRedrawVimView called after exiting full screen
MISC add missing declarations
MISC make distclean when auto/config.mk exists and use clang instead of gcc