Add spec_tooltip & spec_popover; Update documentation
diff --git a/NAMESPACE b/NAMESPACE
index db4b355..f800cc5 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -19,6 +19,8 @@
 export(spec_angle)
 export(spec_color)
 export(spec_font_size)
+export(spec_popover)
+export(spec_tooltip)
 export(text_spec)
 export(usepackage_latex)
 importFrom(knitr,include_graphics)