Docstrings added for public classes
Docstrings added for public classes

Signed-off-by: Quentin Pradet <d17611fde61d73f8de1b8b01bc47d446558ccd8e@apache.org>

Scalr/libcloud,vongazman/libcloud,Scalr/libcloud,apache/libcloud,Kami/libcloud,vongazman/libcloud,Scalr/libcloud,vongazman/libcloud,mistio/libcloud,StackPointCloud/libcloud,erjohnso/libcloud,pquentin/libcloud,mistio/libcloud,StackPointCloud/libcloud,Kami/libcloud,apache/libcloud,ByteInternet/libcloud,Kami/libcloud,erjohnso/libcloud,ByteInternet/libcloud,StackPointCloud/libcloud,ByteInternet/libcloud,mistio/libcloud,apache/libcloud,pquentin/libcloud,erjohnso/libcloud,andrewsomething/libcloud,pquentin/libcloud,andrewsomething/libcloud,andrewsomething/libcloud