Browser compatible, make sure events are strings

Also add _eventKeys, just because.

Signed-off-by: Tim Smart <tim.smart@designworks.co.nz>
Allow for in without hasOwnProperty

Signed-off-by: Tim Smart <tim.smart@designworks.co.nz>
Bump version to 0.1.1

Signed-off-by: Tim Smart <tim.smart@designworks.co.nz>
Merge branch 'release/0.1.1'