Expose formatting of elapsed time as xolox#misc#timer#convert()
De-emphasize e-mail address, emphasize GitHub for feedback
Implement generalized rate limiting of CursorHold events
Functions to persist/recall Vim values from/to files
Generalized asynchronous Vim script evaluation (for vim-easytags)

The idea of forking Vim into the background to perform long running tasks
that would otherwise block the user's editing session originates from the
'async-cleanup' feature branch of vim-easytags, where I picked it up from
a tip by Inko Karkat (@inkarkat). Because I can see this being useful in
several of my Vim plug-ins I decided to generalize the concept and
implement it in vim-misc.

One thing that may not be immediately obvious from the commit is why I
implemented two ways for the results of asynchronous processes to feed
back into the main Vim process. The reason is twofold, both having to do
with Vim's client/server implementation:

 1) Reading through the pull request of the mentioned feature branch it
    looks like Vim's client/server support on Mac OS X is either missing
    or problematic.

 2) Running the 'async-cleanup' branch (which always used client/server
    communication) I saw several crashes on Linux. I have no proof but
    suspected the client/server communication to be the cause of this.

So now there's an alternative if the client/server mechanism starts to
act up (which it may very well do because it's a complex part of Vim).

See also the pull request for the mentioned feature branch:
  https://github.com/xolox/vim-easytags/pull/49