ComponentLoader: Adding better RTT Logger descriptions to import functions to help when debugging import errors.
UseOrocos: Adding install target to create empty directories if someone calls orocos_generate_package without any contents. This will enable the package to be found by the componentloader.
UseOROCOS: Switching xpath detection warning to error if building with rosbuild or catkin
Moving empty install directory generation up so that it always runs if catkin is being used
service: fixed initialization, missing definition and a typo in ServiceRequester/OperationCaller classes

Signed-off-by: Johannes Meyer <johannes@intermodalics.eu>
taskcontext: TaskContext::connectServices() always returned true

Signed-off-by: Johannes Meyer <johannes@intermodalics.eu>
Merge branch 'master' of gitorious.org:orocos-toolchain/jbohrens-rtt
Merge branch 'empty-package-install-target' of gitorious.org:orocos-toolchain/jbohrens-rtt
Merge branch 'xpath-error-with-ros' of gitorious.org:orocos-toolchain/jbohrens-rtt