document Metamodel::C3MRO
Fix MRO signatures
MRO example
[mop] fix mro{,_unhidden} bugs, jnthn++
Add summaries to type docs

I didn't get around to adding them for the Set-related and exception classes yet, but all other currently documented classes should be covered.
Also I didn't add them for roles for now, because I'm not yet sure what's the best way to phrase it for them... should the summary for Rational be "Rational number" or "represents a number as numerator and denumerator" or "role for rational numbers"?
Show summaries in the type indexes

It works for sub-indexes, but for some reason not yet for the main type/ index.
Merge pull request #29 from smls/master

Add summaries / short description for classes
Give a few roles a subtitle
htmlify: allow the user to skip two more steps
Avoid usage of deprecated .tmpdir

lizmat++ for making the deprecation warnings so awesome
Add summaries for roles
Add summaries for all remaining classes
Make summaries work for type docs embedded in language docs
Render role summaries in italic, on type index pages

Since the summaries for classes and roles are phrased differently, it will help readers if we also render them differently.
Merge pull request #30 from smls/master

Add summaries for all remaining documented types, + minor related htmlify improvements
Get rid of a TODO for dotty ops
Missed in last commit: add dumb example for .Foo::bar

Something more in-depth would be better, but this at least shows the
syntax of the op.
Document grep-index
Document first-index
Document last-index