browser: ssMarkdownEditor improvements

Due to binding bug, do not use Bootstrap tabs, instead create our own.

Style tweaks

Closes marklogic/samplestack-internal#87
browser: don't reference gulp-ruby-sass

node-sass is now stable, so we can remove code used as a workaround.
chore(readme): specify ML nightly from 10/24 in README
store joeUser and maryAdmin at startup
Seed data loading everything with guest permissions.
fix permissions setting in dbload
update seed data version
chore(readme): provide link to seed-data
java: convenience .sh script for full gradle run

cleanstart.sh downloads the current seed data and does a full, clean
setup of the Samplestack Java tier and finishes by launching bootrun.

It is not expected to work on Windows. In the future, a cross-platform
solution may be developed in gradle.

For now, it represents the expected path for successful launch of the
Java stack after retrieving the code from git (minus all browser-related
commands).

It should work for a clean install and for a reinstall.
feat(java/cleanstart.sh): use ConfigureClean, ignore server cert

Add dbConfigureClean task to the cleanstart.sh script.

Allow curl to ignore certificate trust issues for seed-data download.
browser: incorporate ssAnswer, ssComment into qnaDoc state

Commenting and answering is functional subject to unit test work.
fix outgoing links for SO questions and users
browser: update to angular 1.3.1
browser: update npm dependencies