Added user defaults and made Preferences window updates for default todo.txt file to open at application startup. Addresses Issue #37.
Added methods to implement opening default todo.txt file at startup based on user preferences. Addresses Issue #37.
Disabled editing for the default todo.txt file text box on the Preferences window. Fixed a minor layout bug in the set font button on the Preferences window..
Removed duplicate pragma mark.
Added menu item (File > Close All) and keyboard command (Command+Option+W) to close all files.
Merge branch 'feature/open-file-on-startup-preference' into develop
Bumped verison number.
Merge branch 'release/1.2.7' into develop