bump version; update news

Author: cpsievert

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: plotly
 Title: Create Interactive Web Graphics via 'plotly.js'
-Version: 4.3.7
+Version: 4.4.0
 Authors@R: c(person("Carson", "Sievert", role = c("aut", "cre"),
     email = "cpsievert1@gmail.com"),
     person("Chris", "Parmer", role = c("aut", "cph"),

NEWS.md

@@ -1,3 +1,17 @@
+# 4.4.0 -- 13 September 2016
+
+## CHANGES 
+
+* To enhance visibility of small markers, `marker.line.color` is now transparent by default.
+* Upgraded to plotly.js v1.17.2 -- https://github.com/plotly/plotly.js/releases/tag/v1.17.2
+
+## BUG FIXES
+
+* It is now possible (again) to set/change attributes of autogenerated `marker.colorbar`.
+* The `add_choropleth()` previously wasn't relaying the `z` attribute.
+* Factors were being treated as characters in `add_segments()` (resulting in incorrect axis category order).
+* No more error in `plot_ly()` when the number of traces is a multiple of ten.
+
 # 4.3.7 -- 11 September 2016
 
 ## BUG FIXES