Integrated Caligraphy library to use custom fonts easier.
changed colours and size of buttons
test
colour changes
matched the style to all the other activities
changed fonts
Merge branch 'development-menuUI' into development

Conflicts:
	routime/src/main/java/me/jessicawu/routime/ListExercisesActivity.java
	routime/src/main/res/layout/activity_listexercises.xml