Add a Version class with a parse method and update UserAgentParser accordingly.
Add documentation to Version.
Add #isValid method to Version.
Add comparison methods to Version.
Switch to using Version instead of string in UserAgent.
Merge branch 'master' into bs-versions
Simplify IE useragent string parsing.
Merge branch 'master' into bs-versions
Merge branch 'master' into bs-versions
Add missing methods and use them where applicable.
Merge branch 'bs-versions' into bs-remove-domhelper
Add specs for createStyle and loadScript.
Merge branch 'bs-remove-domhelper' into bs-remove-fontwatchrunner