Initial manifest for Lineage 15.0

Change-Id: Id0999e626f27e8002c985b9ce99566589f7369c6
diff --git a/README.mkdn b/README.mkdn
index 8538697..ce976c9 100644
--- a/README.mkdn
+++ b/README.mkdn
@@ -10,9 +10,9 @@
     (From root android directory)
     . build/envsetup.sh
     (Go to repo you are patching, make your changes and commit)
-    cmgerrit <for(new)/changes(patch set)> <branch/change-id>
+    lineagegerrit <for(new)/changes(patch set)> <branch/change-id>
 
-    repo start cm-14.1 .
+    repo start lineage-15.0 .
     (Make your changes and commit)
     repo upload .
 
@@ -33,7 +33,7 @@
 
 To initialize your local repository using the LineageOS trees, use a command like this:
 
-    repo init -u git://github.com/LineageOS/android.git -b cm-14.1
+    repo init -u git://github.com/LineageOS/android.git -b lineage-15.0
 
 Then to sync up: