Better error handling

[dennisvdvliet]

I just found out the hard way that I did not have one of the requirements for your plugin installed html2haml

Got the following error message

http://monosnap.com/image/70FCOYmw5eFjmOg3Pm4wziV1prXY2O

Would be nice if it just explained to me I should run gem install html2haml

[nickdowse]

Yeah definitely agree with that. Imma look into it today.

[dennisvdvliet]

In your spare time I assume :-)