A little documentation clean up. Removed some old code.
Removing old files.
Removed some dead code.
Added esc_backslash utility macro.
Added a few types to the clear_component_variables function.
Changed name of export_targets to write_exports_file.
made most of the exported variables advanced for any importing system. Big noise reduction in the CMake gui for dependent projects.
Added function to get git info from working repo.
Marked many cmake cache vars as advanced. Left only those that provided information immediately relevant to the user.
Merge remote-tracking branch 'origin/master' into development