0.4.0

Added:

• Optional static_source key in the rc for the html build.

Changed:

• institution dereference is done by regolith.tools.dereference_institution function
• HTML pages dereference institutions
• person.html allows for authors or editors and hides publications in details
• root_index.html allows for banner to be speced in groups collection
• regolith.builders.CVBuilder now dereferences institutions/organizations
  for employers and education
• regolith.builders.CVBuilder deepcopies each person so we don't modify
  the records during dereference
• regolith.tools.latex_safe wraps URLs in \url{}
• regolith.builders.basebuilder.LatexBuilderBase runs pdflatex last
  if running on windows, rather than latex then dvipdf
• Order yaml collections by key before dump for deterministic changes in collection order (make git more sane)

Fixed:

• Properly handle authors and editors set in regolith.tools.filter_publications
• regolith.tools.fuzzy_retrieval properly handles null values
• education and employment subschemas for people are now just lists
• regolith.builders.BuilderBase uses latex_safe from regolith.tools
• wrap dbdir in @() so xonsh does the right thing