lineage: Simplify README and update with minor fixes

* Deduplicate info that is already in the Wiki

Change-Id: Ib479536051d0164f206c167a01f694a96bac65eb

README.mkdn

@@ -1,45 +1,30 @@
 LineageOS
 ===========
 
-Submitting Patches
-------------------
-
-Patches are always welcome!  Please submit your patches via LineageOS Gerrit.
-You can do this by using these commands:
-
-    (From root android directory)
-    . build/envsetup.sh
-    (Go to repo you are patching, make your changes and commit)
-    lineagegerrit <for(new)/changes(patch set)> <branch/change-id>
-
-    repo start lineage-15.1 .
-    (Make your changes and commit)
-    repo upload .
-
-Note: "." means the current directory
-For more help on using this tool, use this command: `repo help upload`
-
-Make your changes and commit with a detailed message, starting with what you are working with (i.e. "vision: Update Kernel")
-Commit your patches in a single commit. Squash multiple commits using this command: `git rebase -i HEAD~<# of commits>`
-
-To view the status of your and others' patches, visit [LineageOS Code Review](https://review.lineageos.org/)
-
-
-Getting Started
+Getting started
 ---------------
 
 To get started with Android/LineageOS, you'll need to get
-familiar with [Git and Repo](https://source.android.com/source/using-repo.html).
+familiar with [Repo](https://source.android.com/source/using-repo.html) and [Version Control with Git](https://source.android.com/source/version-control.html).
 
 To initialize your local repository using the LineageOS trees, use a command like this:
+```
+repo init -u git://github.com/LineageOS/android.git -b lineage-15.1
+```
+Then to sync up:
+```
+repo sync
+```
+Please see the [LineageOS Wiki](https://wiki.lineageos.org/) for building instructions, by device.
 
-    repo init -u git://github.com/LineageOS/android.git -b lineage-15.1
 
-Then to sync up:
+Submitting patches
+------------------
+Patches are always welcome! Please submit your patches via LineageOS Gerrit!
 
-    repo sync
+Simply follow our guide on [how to submit patches](https://wiki.lineageos.org/submitting-patch-howto.html).
 
-Please see the [LineageOS Wiki](https://wiki.lineageos.org/) for building instructions.
+To view the status of your and others' patches, visit [LineageOS Gerrit Code Review](https://review.lineageos.org/).
 
 
 Buildbot
@@ -47,6 +32,6 @@ Buildbot
 
 All supported devices are built weekly and periodically as changes are committed to ensure the source trees remain buildable.
 
-You can view the current build statuses at [LineageOS Jenkins](https://jenkins.lineageos.org/)
+You can view the current build statuses at [LineageOS Jenkins](https://jenkins.lineageos.org/).
 
-Builds produced weekly by the buildbot can be downloaded from [LineageOS downloads](https://download.lineageos.org/)
+Builds produced weekly by the buildbot can be downloaded from [LineageOS downloads](https://download.lineageos.org/).