Adds GPS prompt dialog when routing with disabled GPS
removes continue when routing states to continue for a distance
adds test for not saying continue on
removes unused method dismiss gps prompt
renames locationHelper to locationClient
adds test for making sure correct alert text is displayed
adds test for making sure the correct intent is fired on button click
adds assertion that gps prompt exists before it is closed
Merge pull request #166 from mapzen/peter/prompt_GPS_on

Adds GPS prompt dialog when routing with disabled GPS
fixes checkstyle build error
Merge pull request #168 from mapzen/peter/remove_continue

Peter/remove continue
assets for a, b, car, bike, walk, switch, line
Merge pull request #170 from mapzen/ekta/design

assets for a, b, car, bike, walk, switch, line
Extracts DebugView component
Moves debug view from BaseActivity to RouteFragment
Adds closest instruction details to debug view
Injects views using ButterKnife
Adds closest instruction coordinates
Adds current location
Organizes debug data