Update error handling and handled partials

[neilkinnish]

1. Updated so as an error is logged rather than reported as an error as this will stop the watcher which could be annoying - although may be a preference option?
2. Added logic to ignore a partial (doesn't log) essentially a sass file prefixed with '_'

[neilkinnish]

Thanks for the merge - just one thing I noticed the errors are allowed to bubble back up which causes the file watcher to stop, is this intended?

It's easy to make a mistake and quickly rectify when writing Sass and if the watcher constantly stops it can be painful, I personally prefer it to just log the error to the console and continue, but understand this is preference.

Can an option be added at least so as it's up to the user?

[dlmanning]

I see your point. I'll look at adding an option.

[dlmanning]

For you: db43de3

[neilkinnish]

Thats great - thanks :)