add workflows

.github/workflows/run_all_tests.yml

@@ -0,0 +1,12 @@
+name: run_all_tests
+on: [push]
+jobs:
+  install-iverilog:
+    runs-on: ubuntu-latest
+    steps:
+      - run: sudo apt install bison flex g++ gcc
+      - run: git clone https://github.com/steveicarus/iverilog.git
+      - run: cd iverilog/
+      - run: ./configure
+      - run: make
+      - run: sudo make install

README.md

@@ -1,9 +1,5 @@
 ![](assets/manta.png)
 
-<div align="center">
-  An In-Situ Debugging Tool for Programmable Hardware
-</div>
-
 Manta is a tool for debugging FPGA designs over UART. It has two modes for doing this, downlink and uplink. The downlink mode feels similar to a logic analyzer, in that Manta provides a waveform view of a configurable set of signals, which get captured when some trigger condition is met. The uplink mode allows a host machine to remotely set values of registers on the FPGA via a python interface. This permits rapid prototyping of logic in Python, and a means of incrementally migrating it to HDL. A more detailed description of each mode is below.
 
 Manta is written in Python, and generates SystemVerilog HDL. It's cross-platform, and its only dependency is pySerial. The SystemVerilog templates are included in the Python source, so only a single python file must be included in your project.