Creates all files in a working directory

Creates a new directory (~/.boot2docker) which will contain all the
files (iso, vmdk). Otherwise your whole filesystem is littered with
files.
update to use simpler defaulting syntax
Merge pull request #161 from SvenDowideit/simpler-defaults

Simpler defaults - and use ./boot2docker for iso and vmdk
fix boot2docker.iso not using config variable
create non existing directory structure for boot2docker.iso and boot2docker.vmdk
Merge pull request #164 from SvenDowideit/pr/101

fix boot2docker.iso not using config variable
Merge remote-tracking branch 'upstream/master'

Conflicts:
	boot2docker