tagging 'v3.3b3'

tagging 'v3.3b2'

tagging 'v3.3b1'

tagging 'v3.3a3'

tagging 'v3.2.1'

tagging 'v3.3a2'

Add CH4 info to README and RELEASE_NOTES

Signed-off-by: Pavan Balaji <balaji@anl.gov>

tagging 'v3.2'

tagging 'v3.2rc2'

Tagging 'v3.2rc1'