Remove duplicate config sample in testdata.
Remove SetDefaultCipher, NewCipher accept cipher parameter.
Connect to server in order, change server_password to array.

Using map to specify multiple servers for client can't preserve the order
specified by the user, so changed the configuration to use array.
Bump version to 0.6.2
Merge branch 'release/0.6.2'

Conflicts:
	README.md