v2.3.7. Bugfix. Improvement.

- v2.3.7 February 6, 2013
	- Changed the `preferredMethod` option into `preferredMethods` which
accepts an array, defaults to `['watch','watchFile']`
	- If the watch action fails at the eve level we will try again with
the preferredMethods reversed
		- This solves [issue #31](https://github.com/bevry/watchr/issues/31)
where watching of large amounts of files would fail
	- Changed the `interval` option to default to `5007` (recommended by
node) instead of `100` as it was before
		- The `watch` method provides us with immediate notification of
changes without utilising polling, however the `watch` method fails for
large amounts of files, in which case we will fall back to the
`watchFile` method that will use this option, if the option is too
small we will be constantly polling the large amount of files for
changes using up all the CPU and memory, hence the change into a larger
increment which has no CPU and memory impact.