tklib: disables test code on dateentry.tcl

This would cause an eval error when calling from an application that
embeds Tcl/Tk.
switch geos build system to cmake, add patch
autotools version was creating incorrect c++ dlls
make gdal compatible with sqlite 3.8.7
add missing iconv library to spatialite-tools
add missing libiconv dependency to libspatialite
Merge pull request #347 from alex85k/spatial

Spatial libraries fixed
Merge pull request #346 from oscarfv/fix-tklib-dateentry

tklib: disables test code on dateentry.tcl
libgit2: Update to 0.21.2
libgit2-glib: Update to 0.0.24