added test raster image from raster package
added test raster image from raster package
Merge branch 'master' of https://github.com/goldingn/movement
added dependency & auto-loading of raster package
added dependency & auto-loading of raster package, deleted .grd files (data folder needs .RData files instead)
Merge branch 'master' of https://github.com/goldingn/movement
Merge pull request #12 from goldingn/master

starting with raster functionality