Add meta-hype to .gitignore.

Likely this should be in a branch that specifically uses it but ...
Move oe-core and bitbake to HEAD of latest release branches.
Ignore meta-intel.
Convert oe-core from a submodule to simply being checked out using the LAYERS / fetch.sh stuff.

Submodules are very brittle and if we want the submodule to be at
a different point in the branch history in different branches then
we're out of luck.
Move downloads to a more standard location.
oe-core master requires bitbake > 1.19 so there goes the bitbake submodle ...
Set bitbake and oe-core branches to track master in LAYERS file.
Add bitbake directory to .gitignore now that it's no longer a submodule.
Merge branch 'master' into selinux

Conflicts:
	.gitignore
	LAYERS