Added libotr back to configure by default

Renamed to BUILD_OTR3
Use AC_SEARCH_LIBS for otr
Check for libotr version
Added otr4.c
Added libotr4 message handlers
Changed functions for libotr4 compatibility
Changed OTR policy allow V1 and V2
Merge branch 'master' into libotr4
Merge branch 'libotr4' of github.com:boothj5/profanity into libotr4
Changed OTR policy for otr4.c
Allow V3, use OTRL_INSTAG_BEST, output error event when no message
Use instag master, and skip fragmentation
Added command to show libotr version
Removed manual logging of test results

Cmocka on more recent distros already has this functionality
Ignore deprecated warnings

To enable native (non brew) compile on Max OS X
Merge branch 'master' of github.com:boothj5/profanity
Added DS store to gitignore
Moved otr sources into folder
Renamed otr implementations
Refactored common otr library code