Dogecoinj description to dogecoin from bitcoin.

Issue #8
Update french localisation by @Kirvx
Change local message port. Fixes #7
Update cr
Remove blockchain.info wallet import.
Only allow .wallet files to be opened. Prevents users from trying to open .dat files.
Migrate to XChange v2 and use BitcoinAverage as exchange rate provider. Closes #2
Update release notes
Update French .
Update checkpoints
Save wondow state on shutdown and try to load it on launch. Defaults to approx. center screen if no state is set.
Update gitignore, remove some unneeded stuff
Update version check URL
Remove a shitload of unneeded stuff...
Add minimize to tray function.
Update checkpoints
Fix exchange for latest XChange lib
Refactor TrayIcon to save its state earlier. Needed to handle shotdown while in tray.
Update release notes.
Update pom for 0.1.1 release.