Updated description of nowrap command

Synced the description comment with the command.
Assumed comment was wrong instead of the command.
No offense, but isn't `set wrap` more comfortable? :)
Add `<leader>gw :Gwrite<CR>` mapping to Readme
Merge pull request #469 from swapnilmj/3.0

Updated description of nowrap command
Update README.markdown

fixed typo (or perhaps changed syntax) for Surround quick help
Merge pull request #485 from aauthor/sd-typo_fix

Update README.markdown
Add vim-signify; remove vim-gitgutter

References #488.
add fullscreen mode for GVIM and Terminal
add bufferline, work well with airline
change airline theme, match with solarized theme
Merge pull request #498 from JoveYu/3.0

some useful configuration
Merge pull request #489 from mhinz/add-signify

Add vim-signify; remove vim-gitgutter
Merge remote-tracking branch 'upstream/3.0' into resync

Conflicts:
	.vimrc