added pauseChain - for suspending chain execution for specified amount of time, added unshift to queue to be able to inject task to the beginning of it, added next which injects new element at the beginning of the execution queue, added queueAdd which executes function as a part of the queue, added web driver methods: isSelected, submit, added to contributors
Merge pull request #77 from bernii/master

Added stuff that is needed in make fully functional sebuilder exporter