Added install directions.

INSTALL.md

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+# How to install wfview
+
+### 1. Install prerequisites:
+(Note, some packages may have slightly different version numbers, this should be ok for minor differences.)
+~~~
+sudo apt-get install build-essential
+sudo apt-get install qt5-qmake
+sudo apt-get install qt5-default
+sudo apt-get install libqt5core5a
+sudo apt-get install qtbase5-dev
+sudo apt-get install libqt5serialport5 libqt5serialport5-dev
+sudo apt-get install libqcustomplot1.3 libqcustomplot-doc libqcustomplot-dev
+sudo apt-get install git 
+~~~
+optional for those that want to work on the code using the QT Creator IDE: 
+~~~
+sudo apt-get install qtcreator qtcreator-doc
+~~~
+
+### 2. Clone wfview to a local directory on your computer:
+~~~ 
+cd ~/Documents
+git clone https://gitlab.com/eliggett/wfview.git
+~~~
+
+### 3. Create a build directory, compile, and install:
+~~~
+mkdir build
+cd build
+qmake ../wfview/wfview.pro
+make -j
+sudo ./install.sh
+~~~
+
+### 4. You can now launch wfview, either from the terminal or from your desktop environment. If you encounter issues using the serial port, run the following command: 
+~~~
+sudo chown $USER /dev/ttyUSB*
+~~~
+