Add try/catch to watchEvent

[chriskinsman]

The watchEvent method is an event handler for fs.watch().

It has no try/catch handler around it. When change() throws due to a ENOENT there is nothing to catch the exception which causes the process to terminate.

Added a try/catch around watchEvent and both log and emit any errors that are raised.

#143

[chriskinsman]

@lucagrulla, Any chance you could check this out and merge it? Fixes issues in our consumption of this package.

Thanks!

[lucagrulla]

Hello @chriskinsman
I might have some time over the weekend to review, merge and release.

Thanks,
Luca

[chriskinsman]

Thanks! Will leave you alone until 10/11!