Add context to some translations

git-svn-id: https://plugins.svn.wordpress.org/am-events/trunk@821185 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fix translation typos

git-svn-id: https://plugins.svn.wordpress.org/am-events/trunk@821189 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add settings page for setting timepicker minute step. 

git-svn-id: https://plugins.svn.wordpress.org/am-events/trunk@821191 b8457f37-d9ea-0310-8a92-e5e31aec5664