Added RecognTags.

- items are described in serialiser.
	- util functions in util/rsrecogn.cc are used to manipulate it.
	- these are attached to GxsIds, with new interface fns.
	- Associated Signing Code is in a separate program.

Other Tweaks.
	- Added RsMemCache::erase()
	- Added RsTlvStringSetRef 
	- Fix for rsturtleitem (already added to trunk).
	- Formatting and debugging.

Status: There is a bug in RsGenExchange::updateGroup which prevents full testing, 
The basic generation, parsing and validation functions have been tested and are ok.
The processing as part of p3IdService still needs to be fully debugged.





git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-gxs_finale@6854 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/libretroshare.pro

@@ -7,7 +7,7 @@ CONFIG += test_voip
 
 #GXS Stuff.
 # This should be disabled for releases until further notice.
-#CONFIG += gxs debug
+CONFIG += gxs debug
 
 # Beware: All data of the stripped services are lost
 DEFINES *= PQI_DISABLE_TUNNEL
@@ -387,6 +387,7 @@ HEADERS +=	serialiser/rsbaseitems.h \
 			serialiser/rstlvbanlist.h \
 			serialiser/rsbanlistitems.h \
 			serialiser/rsbwctrlitems.h \
+			serialiser/rsgxsrecognitems.h \
 			serialiser/rstunnelitems.h
 
 HEADERS +=	services/p3channels.h \
@@ -430,6 +431,7 @@ HEADERS +=	util/folderiterator.h \
 			util/pugiconfig.h \  
 			util/rsmemcache.h \
 			util/rstickevent.h \
+			util/rsrecogn.h \
 
 SOURCES +=	dbase/cachestrapper.cc \
 			dbase/fimonitor.cc \
@@ -529,6 +531,7 @@ SOURCES +=	serialiser/rsbaseitems.cc \
 			serialiser/rstlvbanlist.cc \
 			serialiser/rsbanlistitems.cc \
 			serialiser/rsbwctrlitems.cc \
+			serialiser/rsgxsrecognitems.cc \
 			serialiser/rstunnelitems.cc
 
 SOURCES +=	services/p3channels.cc \
@@ -571,6 +574,7 @@ SOURCES +=	util/folderiterator.cc \
 			util/rsaes.cc \
 			util/rsrandom.cc \
 			util/rstickevent.cc \
+			util/rsrecogn.cc \
 
 
 upnp_miniupnpc {