new service added cart and catalogue

Signed-off-by: sachin <sachin.grover@shephertz.co.in>
added cart and catalogue

Signed-off-by: sachin <sachin.grover@shephertz.co.in>
sample modified

Signed-off-by: sachin <sachin.grover@shephertz.co.in>
Merge branch 'master' of github.com:shephertz/App42_JAVASCRIPT_SDK