Changed colour and color_text to integer in database

/assets/databases/ocw.zip
Added incomplete track to json

/JSON/tracks.json: Added a track with no colours set for testing.
changed a speaker id to not match event speaker id

/JSON/speakers.json: first speaker id no longer matches expected by their associated event.
Schedule json references non existent tracks

/JSON/schedule.json: An event references the new track without colors and another event references a non-existent track for testing.
Added a default track colour

/res/values/colors.xml
Database handler needs to expect integer for colour and color_text

/src/org/osuosl/ocw/DataBaseHandler.java
Changed track variables color and color_text to integer

/src/org/osuosl/ocw/Track.java
Changed default speaker full name

/src/org/osuosl/ocw/Speaker.java: Changed default speaker full name to "not available" for when an event references a non-existent speaker.
Default track and speaker

/src/org/osuosl/ocw/Schedule.java: When a speaker or track can't be found then it uses the default object.