Allow 'O' to go to plugin and remove ESC tip
Allow 'O' to go to plugin and remove ESC tip

Summary:
Jamie complained that he didn't know what ESC did (that it unfocuses search) and
was pressing it in normal mode, wondering what it did. My friend Mack said he
expected pressing 'o' to go to plugin page as well, like NERDTree (and other
things?).

Test Plan: in browser

Reviewers: spicyj, xymostech

Differential Revision: http://phabricator.benalpert.com/D146

divad12/vim-awesome,starcraftman/vim-awesome,vim-awesome/vim-awesome,vim-awesome/vim-awesome,shaialon/vim-awesome,divad12/vim-awesome,shaialon/vim-awesome,vim-awesome/vim-awesome,vim-awesome/vim-awesome,starcraftman/vim-awesome,jonafato/vim-awesome,shaialon/vim-awesome,jonafato/vim-awesome,divad12/vim-awesome,divad12/vim-awesome,starcraftman/vim-awesome,starcraftman/vim-awesome,jonafato/vim-awesome,vim-awesome/vim-awesome,jonafato/vim-awesome,shaialon/vim-awesome