Update fedora.md

The renamed package 'wmdocker' did not make it into Fedora 20. It is still available for rawhide (will be Fedora 21.)
Merge pull request #6042 from dcorking/patch-1

Update fedora.md
Rewrite the mac and windows docs to use the boot2docker installers.

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)