Add travis, add maintainance note

Author: richardeoin

.travis.yml

@@ -0,0 +1,17 @@
+dist: bionic
+language: c
+
+compiler:
+  - gcc
+
+os:
+  - linux
+
+addons:
+  apt:
+    packages:
+      - libusb-dev
+      - libftdi-dev
+
+script:
+  - make

README.md

@@ -198,6 +198,10 @@ GPL v2
 
 Bug reports and pull requests welcome!
 
+This project is passively maintained, so there may be no changes for a long
+time. PRs are more likely to get merged if they are well explained, well
+commented and match the style of the surrounding code.
+
 ## Credits
 
 Modified for the FT-X series by Richard Meadows 2012