Merge branch 'hotfix-3.5.3'
Update README.md
Update README.md
Update README.md
fix json_decode in PHP v5.3
bumping version to v3.5.4
Merge branch 'hotfix-3.5.4'
add travis-ci badge to README.md
add CHANGELOG file
Update README.md
Update README.md
fix channel quota exception
Merge branch 'release-3.6.0'
bumping version to 3.6.0
add php http pipelining example
add IDEA files to gitignore
update comments in Pubnub.php