Improve .travis.yml

Author: mal

.travis.yml

@@ -1,11 +1,15 @@
 language: java
 jdk:
 - oraclejdk7
-install: mvn clean test package
+
+cache:
+  directories:
+  - $HOME/.m2
+
 notifications:
+    email: false
     hipchat:
         rooms:
             secure: HAIO6qjP1Os4yCduLwRfNrXP9K5v3hOpbXs/HOcoPzh0WACTNZUBJx8GPUWlcUJlzaxkUG05QC91dTn2kTyNteFE9xayKw347i7xywcYDttJdEL8M0agIkZowyrOfmiG+wFv/vCayZpf0T/MPYE1gDvFeP4yuP7CU0pdy1j0SRUkHvcpoXcx1OjbW7kMbiO1WedhzGZwrLWabw8UmNybvoyVSZmtBd4acRuOfzOfbynWoWL/9HD9jUoeCIbQeXWFxXGnQb22QpNWRYu7ZMH1ppkE/lI5zJtqZS5BjfEfK3tql4WaL72r4xO4uHkqi0xjUlP0iyQi4WW9G1PGFz6GmZSCrr04eyRQovhEaQcoces4+Q+uT/3pHplT12kE8y5wGTwYJlCfIRjGYN/uqfT6EEdl+8E4ZCA/o3t7rEHrRqxD98Pt+Q/y+GJxtYmGr4n+HAGCfa3BE4uij3N7EisO6mJ7NtMp5g8UGEvnqFV/eV46Urhoih4ILPhTkMKvX7PRxnSvrqE7toY9PXC5Ufkmt5TU7RmTNRT1cnH28MqlpeywWKNkNr8I6chfUCDNeEHT6Ckj00/l+CbQfNtQWQt7XApcCui0cxvTuZSrAKVzNTrWKcN/tMP5XyJ6t/bxBZAFDV4YHzK8fwzNHjz71sLGYukdvls4yLsEW74JqiQZ6Oo=
         template:
             - 'Build #%{build_number} (%{commit}) of %{repository_name}/%{branch} %{result} (%{duration}) %{build_url}'
-    email: false