Make context configurable by id at login

Make context configurable by id at login

Better error when URL cannot be parsed on login

bump to go 1.10.3

bump to go 1.10.3

rancher-compose-executor v0.14.29

Export cluster

Problem:
Cluster is not able to be exported

Solution:
Add sub command rancher cluster export [name/ID] to output a cluster yaml.

Export cluster

Problem:
Cluster is not able to be exported

Solution:
Add sub command rancher cluster export [name/ID] to output a cluster yaml.

use managementClient instead of masterClient

use managementClient instead of masterClient