Leg, Trip, Cost Summary, updated MainActivity

New Trip and Cost Summary fragments
Updated Leg fragments
Support for portrait and landscape
Update dates on Leg List Fragment
Upload docs into /docs/Chris folder

Includes all docs from proposal through Sprint 3.
Forgot strings.xml
Final push before class

MainActivity et. all use onDateTimeListener, not On...
Updated strings.xml
Merge branch '(V4)Leg,Trip,Cost_Summary,Main'

Conflicts:
	res/layout/activity_main.xml
	res/values/strings.xml
	res/values/styles.xml
	src/edu/miracosta/cs134/tripplanner/MainActivity.java
cleanup after v4 chris merge

- had to fix some stuff in strings and styles.xml