Remove multiple cursor plugin

It is incredibly buggy
Prepare for 2.1
Merge branch 'release/2.1'

* release/2.1: (21 commits)
  Prepare for 2.1
  Remove multiple cursor plugin
  Misc keymap changes
  Misc fixes
  Add tomorrow-night and multiple-cursor
  Update bootstrap to reflect repo name change
  Allow option+keys for window movement in iTerm2
  Misc changes
  Add guifont setting fallbacks
  Set mouse for terminal use
  Update README.rst for 2.0
  Better window commands
  Add jedi for python
  Add __pycache__ to NERDTreeIgnore
  Replace MRU and CommandT by ctrlp
  Refactor 3rd party bundle key maps to bundles.vim
  Minor changes
  Minor changes to bundles.vim
  Refactor bundle configs to bundles.vim
  Forgot to edit README for 1.1
  ...
Update bootstrap url in README.rst
Merge branch 'hotfix/2.1.1' into develop

* hotfix/2.1.1:
  Update bootstrap url in README.rst
  Prepare for 2.1