Removed all makefiles and associated documentation from the repo.

Removed all makefiles and associated documentation from the repo.

These makefiles and documents were removed to remove all reference to our
old build system in our repo. Please refer to "Readme.scons.txt" at the
root of the repo for all builds from now on.

Change-Id: I93ae3a4c8d2a075ee24278da469d66ff49f4997b
Signed-off-by: Joseph Morrow <joseph.l.morrow@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/879
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Erich Keane <erich.keane@intel.com>