Checked in documentation

Experimented with Release notes formatting

Updated release notes

Merge remote-tracking branch 'origin/master'

# Conflicts:
#	py4cytoscape/style_defaults.py

Merge branch '1.7.0'

Updated release date in documentation

Document removal of enum class because of build errors

Merge pull request #87 from kozo2/kozo-gitignore

.gitignore: build and dist

Removed --user parameter to avoid error "Will not install to the user…

… site because it will lack sys.path precedence to setuptools "

Improved instructions