added quat log jacobian
fixed silly computation bug
changed to the right quaternion convention of the log jacobian
Merge pull request #21 from simonlynen/serialization_macro

Serialization macro
fixed pow() usage
Switching c++11 to c++0x. Will this break anything else?
Fixed the python logging to respect levels
Merge pull request #22 from mbuerki/master

Quat log jacobian.

TODO: Handle degenerate cases.
removing c++11 flags from other packages to compile c98 for property tree