REF: added better debug logging

@ijstokes with this you can see better debug information for the pacakge detection
with the `-v/--verbose` option

    binstar -v register ...
DOC: added better metavars for channel arguments
BUG: Force not correctly handled in remove

Using --force with remove always leads to message indicating file was not
removed.
Merge pull request #99 from bashtage/remove-force

Thanks a lot, this looks great.
FIX: open file with 'rb' for windows

@bashtage thanks for the help

This should fix issue #100
Merge branch 'master' of github.com:Binstar/binstar_client
FIX: token should be read only by owner
Merge branch 'master' into feature/sites

Conflicts:
	binstar_client/utils/__init__.py