renamed rope.vim to ropevim.vim

--HG--
rename : rope.vim => ropevim.vim
README.txt: instructions for setting up ropevim
using echon in VimProgress
askdata no longer needed
VimUtils subclasses ropemode.interface.Environment
Environment was moved
renamed VIMUtils to VimUtils
added ask_completion()
using a better dialog
renamed RopeCompleter to RopeValueCompleter
not showing all possible values when there are many of them
better default handling
handling default for ask()
implemented push_mark()
setting nomodifiable when readonly is True
not echon in progress
showing the file in other window when other is True
using vim quickfix for showing occurrences
documenting RopeFindFile
fixed reloading files