Add optional reponame argument to create_from_local subcommand

I like to have my repositories more structurally named in Bitbucket so the repositories I create tend to have different remote names then the directory name they reside in.

Creating repo with create then setting remotes manually and pushing is a workaround but it seems not efficient when we already have create_from_local command for that.

So I added the support for an optional reponame positional argument to create_from_local. When specified, it is used as the remote repository name instead of the directory name. When not specified, create_from_local performs as normal.