update release version to 1.6.0
master open again for new features
add development doc area
added announcement text for 1.6.0
fixed announcement for 1.6.0
remove boilerplate info [ci skip]
added announcement on first page
Merge branch 'master' of github.com:geopython/pycsw
add who/when [ci skip]
renamed spec files to OBS compliant name
Update spec files to the ones uploaded to OBS [ci skip]
Merge branch 'master' of github.com:geopython/pycsw