Remove Command-T.  The functionality is fully replaced by CtrlP.
Fix mapping for CTRL-P CTRL-F (it was supposed to launch CtrlP in directory of current file).
Promote g:ctrlp_open_multiple_files setting to common vimrc.
Use ``SetupXxx`` instead of ``call SetupXxx()``.

This will make it easier to hook the setup functionality
for a given language by just re-defining the command
and doing pre- or post-processing before or after
a call to the original SetupXxx() function.
Change to ts=8 everywhere.