For the 0.2 release (me being bad at commits again)

[cybre]

Changes in 0.2:

• "Recent Hastes" has been added (thanks to Sam Hewitt for the design) and is now the default view.
• The default provider is now hastebin.com (hasteb.in is dead atm)
• Code got cleaned up a bit (split things into classes and moved some things into their own methods)
• We now check if your haste-server URL is valid (and tell you if it is not)
• Fixed bug where a new item would be added to the history even if the upload failed.
• This time we try not to crash your whole panel.