Rename RB to reflect current software naming

REALbasic.gitignore → Xojo.gitignore

@@ -1,4 +1,5 @@
-#RB & Xojo temp files/folders
+# Xojo (formerly REALbasic and Real Studio)
+
 Builds*
 *.debug
 *.debug.app
@@ -6,4 +7,4 @@ Debug*.exe
 Debug*/Debug*.exe
 Debug*/Debug*\ Libs
 *.rbuistate
-*.obsolete
+*.obsolete