Changing to global update timer

To facilitate better performance with multiple wc-mode buffers, the local timers were removed in favor of one global timer.

Idle Timer Implementation

The stat generation is now more performant due to the use of an idle timer. This resolves #13.

To use the timer, configure wc-idle-wait for the number of seconds of idle to wait before calculating the word count stats.

wc-mode 1.3

It has been time to tag a new release. This is version 1.3. Changes since 1.0 are

• Goal functions now perform reset by default
• New autoload cookie
• Reset functions added
• Counting functions tied to buffer-local variables