Update lint and docs-travis target to run rstcheck on all the local *.rst files.
Update lint and docs-travis target to run rstcheck on all the local
*.rst files.

ByteInternet/libcloud,mistio/libcloud,andrewsomething/libcloud,Scalr/libcloud,andrewsomething/libcloud,apache/libcloud,mistio/libcloud,Kami/libcloud,Kami/libcloud,mistio/libcloud,ByteInternet/libcloud,ByteInternet/libcloud,Scalr/libcloud,Kami/libcloud,Scalr/libcloud,apache/libcloud,andrewsomething/libcloud,apache/libcloud