Updated Build Elevation Mosaic toolbox and raster functions

All tools in Build Elevation Mosaic Toolbox were updated to to bugs in
the 10.3 build they were built on.  Additionally the Raster functions
were adjusted for the WGS 84/Web Mercator issue found in previous
builds.
deleted unnecessary10.2 toolbox

deleted unnecessary10.2 toolbox.  It should not be here
Merge pull request #168 from NatalieCampos/master

updated build elevation tool box for bug fixes