Bump version to 0.2 and update NEWS

Author: jefferis

DESCRIPTION

@@ -1,7 +1,7 @@
 Type: Package
 Package: natcpp
 Title: Fast C++ Primitives for the 'NeuroAnatomy Toolbox'
-Version: 0.1.1.9000
+Version: 0.2
 Authors@R: 
     person(given = "Gregory",
            family = "Jefferis",

NEWS.md

@@ -1,4 +1,12 @@
-# natcpp (development version)
+# natcpp 0.2
+
+* add fast coordinate / index conversion functions in https://github.com/natverse/natcpp/pull/2
+  - `c_coords21dindex()` 
+  - `c_ijkpos()`
+  - `c_sub2ind()`
+  to make `nat::coord2ind()` and friends much more memory efficient
+
+**Full Changelog**: https://github.com/natverse/natcpp/compare/v0.1.1...v0.2
 
 # natcpp 0.1.1