Squashed '.vim/bundle/nerdtree/' changes from 3a8310a..40d05ac

40d05ac catch an error thrown when refreshing a dir with a FIFO or socket
64cb620 move a couple of functions into NERDTreeCreator
c3b63d2 add some class methods to wrap the NERDTreeCreator public methods
7cbaee2 Merge pull request #227 from kasyaar/copy_node_fix
f5956db fixed error messages on copy node in NERDTree buffer
25b80b8 extract the tree creation functions out into their own class
29d3db8 fix a couple of function calls that should have been renamed
2eff928 some cosmetic updates to the class files
a7d5b3d fix the <enter> mapping
cc0777b move KeyMap_Invoke into the autoload file
8a98426 manually apply #220 to fix NERDTreeFind for hidden dirs
370f180 replace a script level var with a query
fb4a5a1 decompose the giant NERD_tree.vim file
1817ccd Merge pull request #219 from felipebueno/master
154f7aa Added a frequently asked question to README

git-subtree-dir: .vim/bundle/nerdtree
git-subtree-split: 40d05ace57fb51cc2c2b2e9eb81c4832ed291630
Merge commit '238a8a0d75fb651f91c16fe8ae0a005b4e0b8805'