* removed some plugins that I don't use anymore
  minibufexpl.vim, project.vim
  I have dispensed with minibufexplorer because it interferes with the proper
  functioning of the quickfix window.
* fixed filetype detection and hence, syntax colouring
  in my vimrc there are some hard wired csharp syntax rules. I had naively
  done au! (clear all au commands in current group) but the "current" group
  was the default. this happened to clear out all the filetype detections
  as well. the solution was to place the hard wired csharp au commands in
  there own group.
* miscelaneous leader commands added or modified.