add openblas to dependencies

README.md

@@ -27,7 +27,7 @@ If you are using Docker, you can skip this section.
 
 On a Raspbian/Ubuntu/Debian system, you can get most of the required dependencies using:
 ```
-$ sudo apt-get install git python3-numpy python3-requests python3-serial python3-dateutil python3-flask python3-pip
+$ sudo apt-get install git python3-numpy python3-requests python3-serial python3-dateutil python3-flask python3-pip libatlas3-base libgfortran5 libopenblas-dev
 ```
 On other OSes the required packages should be named something similar. 
 
@@ -194,4 +194,4 @@ My [Kraken-SDR fork](https://github.com/darksidelemm/krakensdr_doa) will emit re
 
 Note that the bearing display (in particular the TDOA data polar plot) does put a fairly big strain on some slower devices. Currently the polar plot is generated in a fairly naive way, and definitely has room for improvement. 
 
-I make no promises as to the usefulness and/or performance of this feature in chasemapper - it's essentially a re-implementation of a radio-direction finding mapping system developed by fellow Amateur Radio Experimenters Group members a very long time ago. I've used it in a few local amateur radio direction finding competitions have found it to be useful. It's also important to note that attempting to direction-find radiosonde/high-altitude balloon payloads which are located at high relative elevations (>40 degrees or so) is likely to lead to very inaccurate results due to coning angle limitations (where a bearing cannot be resolved due to insufficient phase-delta between receive antennae). 
+I make no promises as to the usefulness and/or performance of this feature in chasemapper - it's essentially a re-implementation of a radio-direction finding mapping system developed by fellow Amateur Radio Experimenters Group members a very long time ago. I've used it in a few local amateur radio direction finding competitions have found it to be useful. It's also important to note that attempting to direction-find radiosonde/high-altitude balloon payloads which are located at high relative elevations (>40 degrees or so) is likely to lead to very inaccurate results due to coning angle limitations (where a bearing cannot be resolved due to insufficient phase-delta between receive antennae).