Refactor subcommands (ext.)

[ubolonton]

Extension of #30

Additional changes:

• Moved commands into warp.command
• Registered functions as commands by a decorator (not usable by apps yet, because there is currently no good way to load custom code before parsing command line options)
• Fixed skeleton command not using "siteDir" option correctly ("twistd warp skeleton -d test" did not work, but "twistd warp -d test skeleton" did)

[brendonh]

This looks mostly pretty good, but why is the CmdOptions class defined inside the decorator?

Also, I'm not sure that generally-applicable options (like siteDir) should actually be replicated on each command. What was wrong with how it worked before?

[ubolonton]

CmdOptions is defined inside the decorator so that it has access to the function's properties like name and argument list.

Yeah we shouldn't have these options replicated. The fix should have been removing that option from skeleton

[ubolonton]

I have tested this against the latest master.
Please merge it.