jsgui: Replaces calls to getByCid with get.

getByCid was removed in Backbone 0.9.9.
Remove unnecessary callPeriodically in entity-policies.

The callback in initialize() means showPolicyConfig() is called so often
that this callback is constantly overridden and never gets run.
jsgui: Bind 'this' to owning view in functions given to callPeriodically
jsgui policies: Stop propagation of events on policy table.

Means you can click suspend/resume/start policy buttons without toggling
the display of policy config.
Correct typo in AutoScalerPolicy config key description
jsgui policies: Improve display of long policy values
Merge pull request #806 from sjcorbett/backlog

Addresses some backlog issues and adds other small enhancements.