Automatically resize textarea depending on content.

I've striped out the resize handle of the textarea in the form section. Now it gets resized automatically, depending on how much text you typed so far. I used the 'autosize' jQuery plugin here https://github.com/jackmoore/autosize. This concept prevents users from making the textarea as big such that the design is broken but it also avoids a clunky scroll bar.

Here you can see it in Action:
![resize-textarea 1](https://cloud.githubusercontent.com/assets/6717303/4275152/f4dcc75e-3cf9-11e4-9b9b-e04b0a244bf8.gif)