Merge pull request #12 from t6/master

Log exceptions with stack traces in assistants
update readme
move libs back into one project, too many problems
remove scala-js-dom dir
update angular and bootstrap versions
change logo for IE
fix input range display in IE
ui consistency between login and signup
gravatar size fix
isabelle document updates
AssistantBehavior is now deprecated use AssistBehavior instead
update isabelle to assistbehavior
ui fixes
fixed bug in chat history
remove deprecation until future based approach becomes stable
fixes #16: receiveOwnChatMessages can be configured
include collaboration sources into core for better scaladoc
first attempt at #17 still needs some work
make automatic indicators configurable
typo