Added a property to the State for paid charts
Merge branch 'master' into paid

Conflicts:
	app/src/main/java/uk/co/pilllogger/state/State.java
Merge
Started work on integrating with the play store in app purchases api
Merge branch 'master' into paid

Conflicts:
	app/src/main/java/uk/co/pilllogger/activities/MainActivity.java
	app/src/main/java/uk/co/pilllogger/state/State.java
More WIP: Buying things
Merge branch 'master' into paid

Conflicts:
	app/src/main/java/uk/co/pilllogger/activities/PillLoggerActivityBase.java
Successfully tested in app purchases

Code will currently update the State object with available and enabled features
There is a gist with an example of how to trigger purchases here:
https://gist.github.com/0e520fe871191fabe34b#file-gistfile1-java
Merge branch 'export' into paid

Conflicts:
	app/AndroidManifest.xml
	app/src/main/java/uk/co/pilllogger/activities/MainActivity.java
Export option now requires you to purchase the in app item.

This is currently setup to purchase using a test item, it also immediately 'consumes' the purchase, so you can test it again.
We'll need to change this before releasing to actually use the correct item.
The price shown is read from the correct item, setup in the play store.
Added summary information to each tab

Added clear buttons to the time page
Re-added time validation
Attempting to fix CME