Build opencms-core/src-components automatically

Until now, the code under src-components has been manually packaged from
the Eclipse IDE and the resulting binaries have been distributed under
the lib folder.

This commit binds two new src-components build-scripts into the existing
opencms-core build scripts, removes the corresponding jars from the lib
folder, and eliminates the "langdetect-opencms" library by moving the
source code into the opencms-core tree.