Merge pull request #126 from enckse/master

simple travisci definition

.travis.yml

+language: go
+
+install: make deps
+
+script: make

Makefile

 	$(call add-files,$(ARM6))
 	mv oragono $(ARM6)
 	cd $(ARM6) && tar -czvf ../oragono-$(VERS)-arm.tgz *
+
+deps:
+	go get -v -d

README.md

 
 #### Building
 
+[![Build Status](https://travis-ci.org/oragono/oragono.svg?branch=master)](https://travis-ci.org/oragono/oragono)
+
 Clone the appropriate branch. From the root folder, run `make` to generate all release files for all of our target OSes:
 ```
 make