Knockstrap 1.0.0

-Fixed popover positioning, when template is used
-Fixed not changing template, when popover is opened
-Added possibility to add new string-based templates dynamically
-Added possibility to change default template engine for default templates of Knockstrap bindings
-Rewrote stringTemplateEngine implementation
-Added tests for stringTemplateEngine
-Added possibility to change default template engine for header, footer and body in modal binding
-Added possibility to pass modal options via data-attributes
-Reorganized and updated documentation
-Added travis-ci support