start porting to Hakyll 4 -- fix all the obvious things
more progress on porting website to Hakyll 4 -- start work on contexts
Merge branch 'master' into hakyll4
more progress on hakyll 4 migration: loadAll, etc.
hakyll.hs now compiles with Hakyll 4 -- gallery descriptions are still missing
upgrade ghc-pkg oracle to output of 'dump' instead of 'list'

This way we notice even when a package ABI hash changes but the
version stays the same (as might happen, e.g., when making
modifications to a dependency like the 'docutils' package).
clean up Shake.hs
delete old file
potential workaround for strange soft link bug
Merge branch 'master' into hakyll4
fix gallery examples to build with 0.7
almost finished porting to hakyll 4
run markdown on gallery descriptions -- Hakyll 4 port complete!