create ZM_PATH_DATA and point zmupdate to ZM_PATH_DATA/db
Added support for @PKGDATADIR@ in CMakeLists.txt
Merge pull request #1 from ZoneMinder/datapathcmake

Added support for @PKGDATADIR@ in CMakeLists.txt
Merge pull request #200 from knnniggett/zm_path_data

Create ZM_PATH_DATA and point zmupdate to ZM_PATH_DATA/db