Revert "Revert "disable karma crap and enable grunt watch""

This reverts commit 54709f7207e28e1686747378bb6e05bdc10b2c2a.
voting routes
check event_id param not to be empty and valid mongo id
comment routes in voting
add comment
wrote voting api tests
fixed check params call
set timeout at voting test back
Revert "Revert "Revert "disable karma crap and enable grunt watch"""

This reverts commit 540e1978db54c0a2a815e89905e2485771a0ebd6.