rbt: add page (#2789)

pages/common/rbt.md

@@ -0,0 +1,24 @@
+# rbt
+
+> RBTools is a set of command line tools for working with Review Board and RBCommons.
+> Homepage: <https://www.reviewboard.org/docs/rbtools/dev/>.
+
+- Post changes to Review Board:
+
+`rbt post {{change_number}}`
+
+- Display the diff that will be sent to Review Board:
+
+`rbt diff`
+
+- Land a change in a local branch or on a review request:
+
+`rbt land {{branch_name}}`
+
+- Patch your tree with a change on a review request:
+
+`rbt patch {{review_request_id}}`
+
+- Set up RBTool to talk to a repository:
+
+`rbt setup-repo`