Corrects the README to be accurate for Cake 3.

Author: beporter

README.md

@@ -2,8 +2,10 @@
 
 A CakePHP plugin that provides a Shell to read an app's Configure vars from the command line.
 
-* For the Cake 2.x version of this plugin, please use the repo's `master` branch.
-* For the Cake 1.3 version, use the `1.3` branch. (Note: we don't expect to actively maintain the 1.3 version. It's here because it started life as a 1.3 Shell.)
+
+* This is the Cake 3.x version of the plugin, which exists on the `master` branch and is tracked by the `3.*` semver.
+* For the Cake 2.x version of this plugin, please use the repo's `cake-2.x` branch. (semver `2.*`)
+* For the Cake 1.3 version, use the `cake-1.3` branch. (semver `1.*`) **Note:** we don't expect to actively maintain the 1.3 version. It's here because the project started life as a 1.3 Shell.
 
 
 ## Requirements
@@ -14,25 +16,22 @@ A CakePHP plugin that provides a Shell to read an app's Configure vars from the
 
 ## Installation
 
-`composer require loadsys/config-read:2.*`
-
-or
+`composer require loadsys/config-read:3.*`
 
-`git submodule add https://github.com/loadsys/CakePHP-ConfigReadShell.git Plugin/ConfigRead`
 
 
 ## Usage
 
 ```shell
 $ cd path/to/app/
-$ ./lib/Console/cake config_read.config_read Key.Name
+$ ./bin/cake config_read.config_read Key.Name
 'foo'
 ```
 
 ### Format as a bash variable definition
 
 ```shell
-$ ./lib/Console/cake config_read.config_read Key.Name Second.Key
+$ ./bin/cake config_read.config_read Key.Name Second.Key
 KEY_NAME='foo'
 SECOND_KEY_FIRST='bar'
 SECOND_KEY_SECOND='baz'
@@ -42,7 +41,7 @@ SECOND_KEY_THIRD='42'
 Note that this format is automatically used whenever more than one key is returned. For example, if you request a key that contains an array, all values in the array will be returned sequentially. Alternatively, if you pass multiple keys on the command line, they will be returned. The format can also be forced using the `-b` or `--bash` command line switch:
 
 ```shell
-$ ./lib/Console/cake config_read.config_read -b Key.Name
+$ ./bin/cake config_read.config_read -b Key.Name
 KEY_NAME='foo'
 ```