[Closes jadell/neo4jphp#97] Adding specific properties to serialize for node and relation classes
Fix to make the test work on lower php versions
Forgot the ";"
Update GetNodesForLabel.php: fixed issue with label properties not being sent and formatted properly.
Modified GetNodesForLabel.php to disallow url encoding with integers only.
Create LabelTestWithIntegerValue.php
Modified LabelTestWithIntegerValue.php with proper testing.
Updated GetNodesForLabel.php to pass all existing tests.
Fixed undefined variable $propertyValue error.
Replaced "'" around property value with '"'
Replaced is_int with is_numeric
Ignoring PhpStorm project settings
Delete LabelTestWithIntegerValue.php
Added testGetLabelsForNode_PropertyWithIntegerValueGiven_CallsClientMethod()
Fixed formatting
Adding/updating documentation
Fixing labels in the node tests since they're not strings but  objects
Adding `__sleep`, `setClient` and `getClient` on `Label` to handle serialization
Setting the `client` in a `PropertyContainer` will also update the clients of its dependent objects if they're not yet set
Merge branch 'master' of https://github.com/huafu/neo4jphp into huafu-master