fix namespace collision: sentence is now defined in workbook
working on lex-flatmap
fix benchmarks
working on auto-generating intransitive forms of transitive verbs
working on verb auto-variation
add new (exists? <map> <path>) function: true iff <path> exists in <map>.
more work on intransitivizing transitives
move exists? and cleanup some unused functions
transitive-to-intransitive works as expected: now formerly transitive verbs show up in game
Merge branch 'lex-flatmap'
increase font size in correction dialog and decrease game height
using futures to get server up and running faster