fixes #3178 - add feature for compute profiles for hostgroups and hosts

fixes #3339 - nested fact support, allow fact importers to be registered by plugins

fixes #3794 - don't validate IP address that's later provided by a CR

Fixes #3468 - Move token expiry to scope to avoid FK issues

Fixes #3182 - Make IP optional in some circumstances

fixes #1830 - auto assign puppet proxy if its not defined upon facts/reports event

[REFACTOR] fixes #2967 - refactored Fact Importer

Based on Dmitri Dolguikh <dmitri@appliedlogic.ca> original patch.

- renamed original fact_importer class to fact_parser class
- moved fact handling logic to its own fact_importer class
- fact importer now assumes single-value facts...

fixes #3249 - change regex syntax from start/end of line to start/end of string

fixes #2741 - rails 3 syntax

fixes #3222 - nil the certname when handling certs if UUID certs have now been disabled