added a particle class, aiming for a Z boson example
more specific installation instructions
added an environment setup script
documentation and questions: EventStore, Collection, Registry
documentation and questions: EventStore, Collection, Registry, Writer
Merge branch 'documentation' of github.com:cbernet/albers into documentation

Conflicts:
	include/albers/EventStore.h
commented the code: Reader, Handle
reformatted README properly
able to build on macos, need to test lxplus6
conditional for mac os x
Merge branch 'master' of github.com:HEP-FCC/albers
Merge branch 'macos_build' into macos_build_merge

Conflicts:
	README.md
Merge pull request #7 from cbernet/macos_build_merge

Macos build merge
collection id is now unsigned
initialed collectionID to 0, and improved const-correctness
buffer address in embedded handles set in prepareAfterRead automatically
Merge pull request #8 from cbernet/auto_handle_ptr

Auto handle ptr
realistic data model
bug fix for multiple includes
example mains adapted to new EDM

registry pointer set in event store when reading.
need to think about an example with read and write at the same time.