Refactor Smart probe code to enable running simultaneous probes. Use zmq's
ventilator, workers and sink pattern to implement this.
Decouple django code from stap workers.
Enforce maximum number of simultaneous smart probes. Let it be a config
parameter in settings.
Visualization of top clients and shares by nfs operations

Add new probe view and template for nfs share and client visualization.
Add collapsible tree visualization for nfs client and share
visualization.
Add styles for visualization.
NFS activity for shares and clients

Add timestamp to probe data url while fetching data
Dont empty probe content area on probe stop
Style changes for probe content
Merge pull request #157 from Mchakravartula/master

Add usage column in shares table .
Add parent classes for smart probes for better code reuse while adding new
probes.
Refactor non-interactive smart probe views to use the new GenericSProbeView
parent class.
Refactor smart probe views using AdvancedSProbeView parent class
Add a basic view to get list of all smart probes in existence.
Split all smart manager urls to be included in the root urls.py
Update smart manager console to comply with new smart probe api changes.
Merge pull request #158 from sujeetsr/issue#114_top_shares_clients

Issue#114 top shares clients
Merge branch 'master' into issue#118_simultaneous_sprobes
Update content negotiation so formats can still be negotiated like before the
download renderer change.
Add pagination for smart probe post response for consistency with get
responses.
Split storageadmin models into their own files.
NFS client and share activity

Add parse to Probe model and collection to handle backend changes for
data format
Merge pull request #159 from schakrava/issue#118_simultaneous_sprobes

Issue#118 simultaneous sprobes
Merge branch 'master' into issue#160_system_users