Merge pull request #219 from bulwahn/master

some minor tuning
boost: Use wildcard in version for bbappend

Makes it apply to any version of boost from here on.

Signed-off-by: Khem Raj <raj.khem@gmail.com>
README: Add bitbake > 1.20 dependency

Document the specific versions of bitbake needed
Add myself to contributor list

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Merge pull request #218 from kraj/master

boost: making bbappend version-independent
gmapping: updating to 1.3.2 (resolves #220)
Merge pull request #221 from KristofRobot/gmapping-update

gmapping: updating to 1.3.2 (resolves #220)
python-empy: using archive with proper version (resolves #222)