Fix travis #3

Author: aharshac

.travis.yml

@@ -3,7 +3,8 @@ sudo: false
 before_install:
   - source <(curl -SLs https://raw.githubusercontent.com/adafruit/travis-ci-arduino/master/install.sh)
 install:
-  - git clone https://github.com/bportaluri/WiFiEsp $HOME/arduino_ide/libraries/WiFiEsp
+#  - git clone https://github.com/bportaluri/WiFiEsp $HOME/arduino_ide/libraries/WiFiEsp
+  - arduino --install-library "WiFiEsp"
 script:
   - build_platform esp8266
   - build_platform uno