New fonts. Smaller list view
Moved status thingy to main controller

Status management now takes place in MainController. Showing a new
status now needs you to send a notification via NSNotificationCenter
new layout for folder list view. smaller fonts
New Master Detail layout
#16. Added PMMessageView

taken from
https://github.com/MailCore/mailcore2/blob/master/src/ui/mac/MCOMessageV
iew.h. Removed all non ARC-compliant code.
#20 - Prevent error when mails cannot be fetched

Return before mail processing starts and print error on debug console.
Removed debug output
Removed unused web view code
Fixed reference error when trying to reset busy state
Added more code for MCOMessageView
Fixes #16. Can show mails in PMMessageView
Merge branch 'ui_enhancements'