v0.7.5.15 Release

Release notes

New Features
Ubuntu PPA Configurations - allows for apt-get install
Free Fluttershare - earn free fluttercoin for running app
Return Change - checkbox allows for returning change to existing wallet address
Time based progress sync bar - updated progress bar so it reflects time information for syncing

Improvements
Messaging - colorization, ease of use, copy address
SplitBlock - addressbook adjusts if it's enabled to let you quickly choose one of your addresses
Fluttershare - bugfixes, no longer creates change addresses
Block Explorer - fixed an crash issue

Important Notes
Disconnects v0.4.5.7 and earlier clients - Check About to check your version