added completion for git add --patch
added options for git add
quote command for it to be ran every time
Use strerror in uClibc, which doesn't have sys_errlist
https://github.com/fish-shell/fish-shell/pull/808
help command: only use $BROWSER  if it is a valid command

(plus add Google Chrome and Chromium to graphical_browsers and a spelling fix)
help function: tidy up messages, remove the 'difference' option

Fixes #73
Indentation and quote cleanup of help.fish
Parse man8 pages with fish_update_completions

Closes #727
Fix wchar_t cast
Merge branch 'completions-git-add' of git://github.com/phisto/fish-shell into phisto-completions-git-add

Conflicts:
	share/completions/git.fish