Fixes and cleans up build/cache directory usage

Fixes and cleans up build/cache directory usage

Changes include:
 - Building is isolated to a .build directory that is git ignored
 - Caching is isolated to a .cache directory that is git ignored
 - Build scripts have been variablized, and relative paths have been
   removed
 - Unused files removed
 - build.sh, make file cleaned up
 - Fixed broken building of markupsafe and jinja2 packages
 - make clean-cache will remove the cache now
 - per item cleans are removed in place of simple clean .build now
 - includes fix for OSC issue with LP# 1642301

Change-Id: I42b8e4eb694bf0a2c398858814f8b73785931896
Signed-off-by: Tim Rozet <trozet@redhat.com>