remove, rather than add, leading slash from tf frame name

This is in accordance with both the hydro migration guidelines [1] and the implementation of TFClient.subscribe() (TFClient.js:102)

[1]: http://wiki.ros.org/hydro/Migration#tf2.2BAC8-Migration.Removal_of_support_for_tf_prefix
Merge pull request #79 from T045T/devel

Fix TFClient by removing, rather than adding, a leading '/' character in TFClient.processFeedback()
use the same ID to unadvertise a topic as was used to advertise it

This is a simple fix for the problem described in RobotWebTools/rosbridge_suite#83
add instructions for outdated versions of NPM/Node.js on Ubuntu
Merge pull request #84 from T045T/devel

fix unadvertising Topics and add some instructions
only advertise a topic when it isn't currently being advertised

otherwise, a new advertiseId would be generated, making it impossible to properly unadvertise
use proper parameters for addTwoInts service
remove build folder and change examples to use CDN versions of roslib.js
cleanup
cleanup of decodeTypeDefs function
taged as 0.8.0-SNAPSHOT
Merge pull request #87 from rctoris/develop

General Cleanup
build removed from develop
removed doc from develop
0.8.0
Merge branch 'develop' of github.com:RobotWebTools/roslibjs into develop
0.8.0 release