Update package.xml

Removing all references to Eigen in package.xml and adding cmake_modules as a run dependency.
Update package.xml
Merging CMakeLists.txt from master
Changing hydro's version number to conform to new (self-imposed) versioning standard
Updating changelog prior to release of 1.1.2
Merging CMakeLists.txt from master into hydro_devel
Merging UTM transform additions from master branch
Merging master changes with hydro-devel
Merging UTM transform node changes from master
Fix for linear velocity transformation as identified in issue #20
Merging changes from differential branch
Fixing bug with update vector
Some changes to ease GPS integration
Updating changelog prior to release
1.1.3
Adding utm_transform_node to install targets
Updating changelog prior to release
Fixing changelog
1.1.4
Adding rostest dependency to package.xml