New header definitions, parsers and vptrs
UT and fixes
Merge remote-tracking branch 'origin/master' into rf-billing-headers
Originating handling
Better custom header parsing (handle errors correctly)
Update the term-ioi on ENUM lookup
Merge remote-tracking branch 'origin/master' into rf-billing-headers
Support for generic params
Merge remote-tracking branch 'origin/master' into rf-billing-headers
Live test issues, initialize memory before using it
Merge pull request #149 from Metaswitch/rf-billing-headers

Reviewer Mike: Rf billing headers