added email, hipchat, slack notifications to .travis.yml
added email, hipchat, slack notifications to .travis.yml

arthurprs/aerospike-client-python,aerospike/aerospike-client-python,arthurprs/aerospike-client-python,trupty/aerospike-client-python,aerospike/aerospike-client-python,trupty/aerospike-client-python,trupty/aerospike-client-python,aerospike/aerospike-client-python,arthurprs/aerospike-client-python