fixes #3256 - include members in usergroup show

refs #2792 - Adding comments to pxe templates

fixes #3267 - API v1 compatibility for /api/hosts

Fixes #3350 - Adds title on login page

fixes #3279 roles edit page is long and missing a filter

fixes #3140 continue - apipie params fix

refs #2967 fact deleted counters did not propagate correctly.

[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 #3364 Add option to disable automatc host creation when a report is received

fixes #3266 - ensures there are no duplicate notifications