fixes #3138 - move CR library loading into initializers, only show available providers
fixes #3266 - ensures there are no duplicate notifications
fixes #3364 Add option to disable automatc host creation when a report is received
[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
- added a uniqueness constraint on fact_values table on fact_name_id and host_id
- added tests
refs #2967 fact deleted counters did not propagate correctly.
fixes #3140 continue - apipie params fix
fixes #3279 roles edit page is long and missing a filter
Fixes #3350 - Adds title on login page
fixes #3267 - API v1 compatibility for /api/hosts
refs #2792 - Adding comments to pxe templates
fixes #3256 - include members in usergroup show
fixes #2951 - Host API documentation lacks compute_resource_id