prepare for replacing the shell script
Merge pull request #119 from SvenDowideit/rename-to-boot2docker

prepare for replacing the shell script
remove --dir= option for now, it would require double reading the flags and profile - might add it as a feature later, if its needed
Merge pull request #121 from SvenDowideit/remove--dir-option

simplify the cfg path to BOOT2DOCKER_DIR, $HOME/.boot2docker and $USERPROFILE/.boot2docker
gosh, I just simplified how the config stuff gets done, but there's still more than was originally documented :/
Merge pull request #122 from SvenDowideit/update-readme

gosh, I just simplified how the config stuff gets done, but there's stil...
we don't use Env vars like this, so tell the user the cmdline option they could use
Merge pull request #124 from SvenDowideit/not-env-vars

we don't use Env vars like this, so tell the user the cmdline option they could use
check to see if the hostonlyif created the dhcp server and if it did, modify

OSX and Windows do not seem to work the same way :(
bump to v0.9.2
Merge pull request #126 from SvenDowideit/0.9.2

bump to v0.9.2
Merge pull request #125 from SvenDowideit/osx-dhcpserver-init-issue

check to see if the hostonlyif created the dhcp server and if it did, modify