Fix RemoteShell by removing extra ANSI CSI escapes

Fix the hanging problem in RemoteShell by removing extra ANSI CSI escape sequences in bash terminal prompt texts of different OS.

Fix Windows compatibility

[#64] Fix RemoteShell and Windows compatibility

Moreover, add option to change RemoteRunnerProxies to custom proxies.

1.4.0b1

Merge pull request #63 from nokia/kubernetes-shell

[#62] Add kubernetes shell