added v21 appcompat support
only appcompat v13:21 needed in buid.gradle
compiles with material design but no toolbar yet
first attempt to get toolbar working, but not working
digging a deep hole
removed android-support-lib-v13.jar and updated build.gradle
eliminated pre-v14 support
eliminated Hints class
did most of refactoring advocated by Android Studio code analyzer
starting to look like toolbar is working
about to abandon this, seems no way to use toolbar and layout/list_content in fragment
new layouts and toolbars starting to work
fixed screenslide to use toolbar
modified prefs to use toolbar, note original SettingsFragment not used anymore
search now works with materialdesign
material design theme done.  Added elevation (only will work with Android 21
removed TODO in CodeCheckBox.java
merged develop
fixed merge issue in Help.java, made accent color black in pre-21 (to avoid inconsistent button colors due to bug in appCompat that won't tint programmable checkboxes, yet sometimes will tint them), kept colorAccent blue in 21
deleted SettingsFragment