Merge pull request #1 from realpdm/master

Updated README.md with range syntax examples
flip libcrange definition back into libcrange.c
first stab at an easy api that doesn't expose range internals or apr
range_easy_destroy for cleanup of easy_range structures
set.h not needed in libcrange.h
ruby bindings to the easy api
ruby needs rubygems
ruby ffi
python rangelib binding
python-cffi deps
test pip