Adds back user/gettingstarted.html

Fixed some relative path, which are not working with symbolic links.
Add Scalastyle section to dev doc
Merge pull request #65 from sschaef/t-scalastyle

Add Scalastyle section to dev doc
Added docs for find-occurrences
Merge pull request #64 from mads379/find-occurrences-docs

Added docs for find-occurrences
Added labels 'new' and 'plug-in' to Find Occurrences feature
Added changelog and fixed Occurrences title.
Fix the title for the 3.0.1 change log.