Add Makefile to use with Eclipse CDT instead of helper script

Signed-off-by: Dmitry Prokhorov <dipspb@gmail.com>
Minor fixes for Makefile and README

Signed-off-by: Dmitry Prokhorov <dipspb@gmail.com>
Minor README.txt tweaks.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
Merge branch 'support-for-eclipse-cdt'