Pluralize agent_nb_class

This is more consistent with the block name for jobs
Remove comment that does not apply here

This was a stupid copy-paste error
Make filtering agents by hostname case insensitive
Merge pull request #192 from guidow/agents_index_ui_fixes

Agents index ui fixes
Add single agent view for user interface
Pluralize agents_nb_class
Merge pull request #190 from guidow/single_agent_ui

Add single agent view for user interface