I18n update. v0.4.21 release prep.
prep for 0.4.21 release
update to bitcoinj 0.7.1, xchart 2.0.0
backport single button from 0.7
Merge branch 'v0.4' of github.com:jim618/multibit into v0.4

Conflicts:
	pom.xml
	src/main/java/org/multibit/viewsystem/swing/view/ChartsPanel.java
Merge branch 'v0.4' of github.com:jim618/multibit into v0.4
chart updates. ticker updates
I18n update
Merge branch 'v0.4' of github.com:jim618/multibit into v0.4
Prep for release 4.22
tidy up
I18n update. Fixed background color of header nimbus -> system
release blockchain
I18n and backport of version number alert
update to bitcoinj 0.7.2
update release notes
fix for reading single row only
more logging. checks on filenames prior to delete
can now have messages in version alert
widened logging. Adding time and date of startup.