[BUILD] added find module for xerces-c
[BUILD] switched from CMAKE_FIND_ROOT_PATH to CMAKE_PREFIX_PATH as it is the preferred way for giving additional base-directories for find_package
[CI,DOC] replaced CMAKE_FIND_ROOT_PATH with CMAKE_PREFIX_PATH in doc and ci scripts
[BUILD] fixed find_xerces variable names
[BUILD] rewrote findlibsvm to be more cmake like
[NOP] fixed case problem (libSVM -> LIBSVM)
[BUILD] some more cleanups of find scripts
[BUILD] switched to proper find module for coin

 * fixed compile issue in LPWrapper
[BUILD] removed last traces of old contrib finding code
[BUILD,PYOPENMS] temporary workaround for pyOpenMS

 * see #900
Merge branch 'develop' into feature/better-lib-finding
Merge pull request #894 from aiche/feature/better-lib-finding

[FEATURE] improved 3rd party lib finding