kivy 2.0.0 + cleanup

INSTALL.md

@@ -44,7 +44,7 @@ Simply download and run, everything is included.
 ### <a name="WindowsSources"></a>Installation from sources
 
 * Download the repository by clicking the green *Clone or download* on this page and *Download zip*. Extract the contents.
-* Make sure you have a python installation, I will assume Anaconda (Python 3.7), available [here](https://www.anaconda.com/products/individual#download-section).
+* Make sure you have a python installation, I will assume Anaconda (Python 3.7/3.8), available [here](https://www.anaconda.com/products/individual#download-section).
 * Open 'Anaconda prompt' from the start menu and navigate to where you extracted the zip file using the `cd <folder>` command.
 * Execute the command `pip3 install .`
 * Start the app by running `katrain` in the command prompt. 
@@ -53,7 +53,7 @@ Simply download and run, everything is included.
 
 ### <a name="LinuxQuick"></a>Quick install guide
 
-If you have a working Python 3.6/3.7/3.8 available, you should be able to simply:
+If you have a working Python 3.6-3.8 available, you should be able to simply:
 
 * Run `pip3 install -U katrain`
 * Run the program by executing `katrain` in a terminal.
@@ -94,10 +94,10 @@ Then, try installing python package dependencies using:
 pip3 install -r requirements.txt
 pip3 install screeninfo # Skip on MacOS, not working
 ```
-In case the sound is not working, or there is no available wheel for your OS or Python version, try:
+In case the sound is not working, or there is no available wheel for your OS or Python version, try building kivy locally using:
 ```bash
 pip3 uninstall kivy
-pip3 install kivy --extra-index-url https://kivy.org/downloads/simple/
+pip3 install kivy --no-binary kivy
 ```
 
 You can now start KaTrain by running `python3 -m katrain`