adding travis, removing travis from .gitignore (#38)

Author: brentru

.gitignore

@@ -7,6 +7,4 @@
 # platformio (testing)
 .pioenvs
 .piolibdeps
-.travis.yml
 platformio.ini
-

.travis.yml

@@ -0,0 +1,25 @@
+language: c
+sudo: false
+
+# Blacklist
+branches:
+  except:
+    - gh-pages
+
+env:
+  global:
+     - PRETTYNAME="Adafruit IO Arduino Library"
+
+
+before_install:
+   - source <(curl -SLs https://raw.githubusercontent.com/adafruit/travis-ci-arduino/master/install.sh)
+
+install:
+    - arduino --install-library "Adafruit IO Arduino","Adafruit MQTT Library","ArduinoHttpClient","Adafruit Unified Sensor","Adafruit NeoPixel","DHT sensor library"
+
+script:
+    # build ESP8266 target
+    - build_platform esp8266
+    # build SAMD target
+    - arduino --install-library "WiFi101"
+    - build_platform zero