fixed requirements issue, added more docs

docs/installation/installing-hyperglass.md

@@ -0,0 +1,44 @@
+# Download
+
+## System Requirements
+
+!!! warning "Compatibility"
+    To date, Hyperglass has only been installed tested on Mac OS X 10.14 and Ubuntu Linux 18.04. Installation instructions are specific to Ubuntu 18.04. Installation instructions for additional operating systems are forthcoming (contribution welcome!).
+
+Hyperglass is written and tested on Python 3.7, but should be backwards compatible with any Python 3 version (albeit untested). If needed, install Python 3 and PyPi 3 on your system:
+
+```console
+# apt install -y python3 python3-pip
+```
+
+## Clone the repository
+
+```console
+$ cd /opt/
+$ git clone https://github.com/checktheroads/hyperglass
+```
+
+## Install Required Python Modules
+
+```console
+$ cd /opt/hyperglass/hyperglass
+$ pip3 install -r requirements.txt
+```
+
+## Clone Example Configuration Files
+
+```
+$ cd /opt/hyperglass/hyperglass/config/
+$ for f in *.example; do cp $f `basename $f .example`; done;
+```
+
+## Test the Application
+
+At this stage, Hyperglass should be able to start up with the built-in Flask development server. This will be enough to verify that the application itself can run, and provie a means to test branding customizations, router connectivity, etc., prior to placing a production-grade WSGI & web server in front of Hyperglass.
+
+```console
+$ cd /opt/hyperglass/hyperglass/
+$ python3 app.py
+```
+
+You should now be able to access hyperglass by loading the name or IP on port 5000 in a web browser, for example: `http://10.0.0.1:5000`. Note that the Flask development server is **not** suited for production use. This will simply verify that the application and dependencies have been correctly installed. Production deployment will be covered in the next sections.