Added more indexing

This way global CRITs search can hit on: 

IPs resolved from domains requested 
full HTTP request URI's
User-Agents
Add option to run in all available sandboxes

Enter -1 for the Machine variable, and all sandboxes will run the sample.
Add more data to results

+info section
    +sandbox name
    +analysis started/ended
    +link/ID to analysis (dependent on webui_host variable)
+signature section
    +description
    +name
    +severity
Changed multi_task to T/F
map machine_id to task_id

Should fix machine_id returning 'None' in Cuckoo <=1.1. 

If using existing task ID, attempts to pull machine name from 'info' section as before. 

If using existing task ID on Cuckoo <=1.1, will return machine name 'None' and notify in log.
add 1 line for logging
Update __init__.py

syntax error
Re-wrote service to use objects instead of context

Per conversations on the development mailing list, future services will use objects rather than service context. Additionally, _add_file() will be deprecated. These changes "future proof" the script by getting rid of both the service context and _add_file().
Update __init__.py

fixed machine_name error when using existing task.
Reverting to context

Setting back to context. Objects to come later per https://github.com/MITRECND/crits_services/pull/3#issuecomment-50658264
Update __init__.py

Allow for no machine name to = first available
Update __init__.py

indentation fix
Merge pull request #3 from TheDr1ver/patch-1

Add results/indexing to cuckoo service