Update directory name and installation section

README.md

@@ -33,11 +33,9 @@ Installation
 
     * via SSH: `git@github.com:flowroute/flowroute-numbers-messaging-python.git`
 
-2. Switch to the newly-created `flowroute-numbers-messaging-python` directory. To build and install the required modules, run the following:
+2. Switch to the newly-created `flowroute-sdk-v3-python` directory. This version of the SDK comes with a requirements file listing the required Python libraries. Click [here](https://packaging.python.org/installing/#requirements-files) to learn more about different ways to install Python packages. 
 
-`python setup.py install`
-
-3. Version 3 of the Flowroute SDK for Python comes with a requirements file listing the required Python libraries. Click [here](https://packaging.python.org/installing/#requirements-files) to learn more about different ways to install Python packages. `pip` is already installed if you're using `Python 2 >=2.7.9` or `Python 3 >=3.4`. This SDK has been tested with both `2.7.9` and `3.6.4`. To see which version of `pip` is installed on your machine, run the following:
+`pip` is already installed if you're using `Python 2 >=2.7.9` or `Python 3 >=3.4`. This SDK has been tested with both `Python 2.7.9` and `Python 3.6.4`. To see which version of `pip` is installed on your machine, run the following:
 
 `pip --version`