Fixes some bugs

- while checking BuddyPress config on multisite (props Nat0n)
- on specific browser for the duration field (props @vegaskev)
- Get rid of some console.log in BackBone js file (pros Nicolas Juen)
- english mistakes (props @schwarzaufweiss)

git-svn-id: https://plugins.svn.wordpress.org/rendez-vous/trunk@892685 b8457f37-d9ea-0310-8a92-e5e31aec5664