Merge pull request #6 from sreekanth-cb/go_module

Using the right type of MMapPageGranularity for windows

Merge pull request #5 from sreekanth-cb/go_module

adopting go modules

more store/README tweaks

improve store/README

README mention of the store subpackage / subdirectory

fixes #2 - renamed to rhmap.New()

fixes #1 - package alias was unnecessary

heap favors int64 instead of int

move heap into store package

added Extra field to heap

heap.Sort()

heap.Reset()

PushBytes()