Added paper
Merge pull request #33 from ethz-asl/add_paper

Added paper
Update README.md
adding dependency to core so that config is build first
Merge pull request #34 from ethz-asl/fix/gencfg

adding dependency to core so that config is build first
autogen doxygen
Ignore documentation
Update README.md
update doxyconf
merge
Update README.md
update dox
merge
fixed a last compilation warning dues to unused typedef
Merge pull request #35 from ethz-asl/fix/compilation_warning_unused_typedefs

fixed a last compilation warning dues to unused typedef
added publishers for covariances
-added DaoubleMatrixStamped message
-publishers for core state covariance, aux state covariance, and core-aux cross-cov
-extended state definition and counters for core error state counting
fixed doc
fixed matrix block reference issue and corrected formatting
further formatting and row-major storage comment
Merge pull request #36 from ethz-asl/feature/cov_publishers

added covariance publishers