fix two distribution related bugs

fixes
 * #WEBINTERFACE-427
 * #WEBINTERFACE-428
map distribution of level and date to useful vals

you can now also search for 'date' instead of created_at

fixes #WEBINTERFACE-423
bumped version constant
show correct sidebar in unisearch results

fixes #WEBINTERFACE-430
fix wrong http method for hosts showrange

fixes #WEBINTERFACE-432
Merge branch 'develop' into otter