lineage: Simplify README and update with minor fixes

* Deduplicate info that is already in the Wiki

Change-Id: I8d7b8192332c8d5a1756ac55a15f72aa59ffb6a4

README.mkdn

@@ -1,50 +1,37 @@
 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: "." meaning 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 commit using this command: git rebase -i HEAD~<# of commits>
-
-To view the status of your and others' patches, visit [LineageOS Code Review](http://review.lineageos.org/)
-
-
-Getting Started
+Getting started
 ---------------
 
 To get started with Android/LineageOS, you'll need to get
 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](http://wiki.lineageos.org/) for building instructions, by device.
+To view the status of your and others' patches, visit [LineageOS Gerrit Code Review](https://review.lineageos.org/).
 
-For more information on this Github Organization and how it is structured, 
-please [read the wiki article](http://wiki.lineageos.org/w/Github_Organization)
 
 Buildbot
 --------
 
-All supported devices are built nightly and periodically as changes are committed to ensure the source trees remain buildable.
+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 in the [Jenkins](http://jenkins.lineageos.org) tool.
+Builds produced weekly by the buildbot can be downloaded from [LineageOS downloads](https://download.lineageos.org/).