Initial import of convar stuff

1) Natives to create, find, set, and get convars
2) "cvars" option added to sm menu
3) Some internal additions to CPlugin to store a convar list
Still some things left to do...

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%40463

core/msvc8/sourcemod_mm.vcproj

@@ -183,6 +183,10 @@
 				RelativePath="..\AdminCache.cpp"
 				>
 			</File>
+			<File
+				RelativePath="..\CConVarManager.cpp"
+				>
+			</File>
 			<File
 				RelativePath="..\CDbgReporter.cpp"
 				>
@@ -227,6 +231,10 @@
 				RelativePath="..\smn_admin.cpp"
 				>
 			</File>
+			<File
+				RelativePath="..\smn_convar.cpp"
+				>
+			</File>
 			<File
 				RelativePath="..\smn_filesystem.cpp"
 				>
@@ -273,6 +281,10 @@
 				RelativePath="..\AdminCache.h"
 				>
 			</File>
+			<File
+				RelativePath="..\CConVarManager.h"
+				>
+			</File>
 			<File
 				RelativePath="..\CDbgReporter.h"
 				>
@@ -626,6 +638,14 @@
 				>
 			</File>
 		</Filter>
+		<Filter
+			Name="HL2SDK"
+			>
+			<File
+				RelativePath="..\convar_sm.h"
+				>
+			</File>
+		</Filter>
 	</Files>
 	<Globals>
 	</Globals>