one stop versioning, adjusted about view
about.html, AboutActivity.java, activity_about.xml:
-added header to top so that app icon, name, and version text can be displayed better
-version information pulled from Versioning instead of from html
-removed that info from html
-replaced html link color with tag that is replaced during runtime with the accent color

build.gradle, Versioning.java:
-moved versioning information to the gradle build file, Versioning now pulls that information from the BuildConfig during runtime

activity_main.xml:
-moved warning text to be centered in view (still needs to be replaced with something pretty)