update README.md
add vanilla mscgen export (debug only)
add istanbul license
correct typo in comment
add missing bracket to skeleton stylesheet
remove superfluous requirejs path definitions
communications diagrams from using dagre (code disabled for now)
bump version
dot & dagre exports: "explode" broadcasts to the individual arcs
add ast2dagre to Makefile dependencies
merge for gh-pages build
build 0.9.1