Eliminate trailing whitespace deletion behavior for emacs

Results in too many spurious changes to group projects.
Minor Powerline color change from white to black for green background area
Remove jedi and trailing whitespace from python.el

.python-enviroments is currently broken and whitespace changes
result in too many spurious git diffs.
Eliminate redundant packages in el-get's initialization

Jedi eliminated and duplicates of powerline and package too.