Fixes README for opening vim with no files
Merge pull request #347 from kelaban/minor-fix-to-readme

Fixes README for opening vim with no files
fix a retarded bug with FlagSet.clearFlags
add `.refreshFlags()` to path/dir/file objects

This will trigger the path refresh callbacks without refreshing the
path's from disk (which takes ages)
move ui functions out into their own autoload

All of the autoload shit needs to be cleaned up... break it out first
continue breaking up the autoload/nerdtree god module
continue breaking down the epic autoload module

Add 2 new classes and move code into them from autoload:

* NERDTree. Each nerdtree buffer now has a NERDTree object that holds
  the root node and will old other util functions
* UI. Each NERDTree object holds a UI object which is responsible for
  rendering, getting the current node, etc

Still a fair few methods to sort through in autoload (many of which will
end up in the above classes) - need sleep though.
Merge branch 'master' of github.com:scrooloose/nerdtree
Updating creator.vim file (this fixes #352)
Merge pull request #353 from lucascaton/master

Updating creator.vim file (this fixes #352)
Merge branch 'master' into expt_add_path_flags_and_git

Conflicts:
	autoload/nerdtree.vim
	lib/nerdtree/creator.vim
fix the NERDTreeFind command - broken in recent refactoring
Merge branch 'master' into expt_add_path_flags_and_git
move some more view code into the UI class
Merge branch 'master' into expt_add_path_flags_and_git
remove testing git plugin
add highlighting for flags

Rename the old NERDTreeFlag syntax item to NERDTreeIgnore.
Merge branch 'expt_add_path_flags_and_git' of github.com:scrooloose/nerdtree into feature/new_expt_add_path_flags_and_git

* 'expt_add_path_flags_and_git' of github.com:scrooloose/nerdtree:
  add `.refreshFlags()` to path/dir/file objects
  fix a retarded bug with FlagSet.clearFlags
Merge branch 'up/master' into feature/new_expt_add_path_flags_and_git

* up/master:
  add highlighting for flags
  remove testing git plugin
  move some more view code into the UI class
  fix the NERDTreeFind command - broken in recent refactoring
  Updating creator.vim file (this fixes #352)
  continue breaking down the epic autoload module
  continue breaking up the autoload/nerdtree god module
  move ui functions out into their own autoload
  Fixes README for opening vim with no files

Conflicts:
	autoload/nerdtree.vim
	nerdtree_plugin/git.vim
switch to new notifier listeners interface