Added private NodeHandle to resolve node namespace parameters.

+ Private NodeHandle for namespaced parameter support
+ Published pointcloud topic takes the namespace of node name
+ tf_node_graph example of working pointcloud node
o Updated version number to 0.1.4

Resolved bug where transform time.sec and time.nsec are published as 0

+ Accessing sensor transform through `Sensor.getTransform()` now makes use of `boost::shared_ptr`

Update Version to 0.1.2

Added sensorConfig.yaml entries for sensor/device/type

+ Dynamic initialization of sensors through sensor_hub package
+ Minor documentation fixes

Resolved overwritten position bug

! Changed position / rotation parameter keys
! Fixed bug where posY was overwritten by yaw (both previously
identified by key 'y'
+ Updated Version Number to 0.1.0 to recognize stable state