Add NEWS.md

NEWS.md

+printrun-20140406
+=================
+
+New features
+------------
+
+- New 3D visualization
+- New GCode plater
+- Updated "standard" controls
+- New "mini" controls mode
+- New print speed control slider in Pronterface
+- New plater features:
+  * STL cutter
+  * STL rebase
+- G-Code injection at beginning of layer and edition of entire G-Code
+- The G-Code modified using the injector or layer editor can be saved
+- Controls and log pane can be folded to leave more space for visualization
+- Added a lighter GCode parser for non-graphical interfaces
+- Window size and configuration is now saved across runs
+- Power management: Printrun now runs on high priority during prints and should
+  inhibit sleep modes
+- New host commands, `run_script` and `run_gcode_script` to run custom scripts
+  during prints. The output of the script ran by `run_gcode_script` will in
+  turn be processed as G-Code or host commands
+- 3D viewer colors are now configurable
+
+Bugs fixed
+----------
+
+- Many fixes around custom buttons
+- Much more :)