Merge pull request #17 from rjbs/package-underscore

allow underscores in package names, for pod extraction
Fix a miscalling of the 'x' operator, and don't use --htmlroot unless we have an actual argument to pass to it.
Remove MANIFEST entries for code removed in 0c9a1fa5c.  Also skip *.orig patch remnants.
Don't force HTML building when the user's %Config doesn't require it.  It's slow.
Get rid of seemingly bogus installation invocation
Also skip HTML building in t/manifypods.t when the user doesn't need it
conditionally use deprecate.pm: Module-Build to leave core

Note that this affects inc::latest and inc::latest::private as
well.  If these should be staying in core then we need to:

a) say so
b) split them into their own distribution.