Added open source license to MainActivity.
Fixed App Version preference in large screen layout.
Removed old Settings classes.
Fixed Credits preference.
Updated Credits.
Getting the rate app preference ready.
Fixed rate app preferences.
Updated changelog.
Fixed widget provider bug.
Tweaked widget layout.
Added more functionality to the base activity.
Removed unneeded methods.
Added still more functionality to the base activity.
Documented the code.
Merging into master.
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Fixing conflicts in merger.
Fixing conflicts in merger.