doc update

Author: jcoffland

README.md

@@ -2,9 +2,9 @@
 
 OpenSCAM is an ​Open-Source software which can simulate 3-axis NC machining. It is a fast, flexible and user friendly simulation software for the DIY and Open-Source community.
 
-At home manufacturing is one of the next big technology revolutions. Much like the PC was 30 years ago. There have been major advances in desktop 3D printing (e.g. ​Maker Bot) yet uptake of desktop CNCs has lagged despite the availability of ​cheap CNC machines. One of the major reasons for this is a lack of Open-Source simulation and CAM (3D model to tool path conversion) software. CAM and NC machine simulation present some very difficult programming problems as evidenced by 30+ years of academic papers on these topics. Whereas 3D printing simulation and tool path generation is much easier. However, such software is essential to using a CNC.
+At home manufacturing is one of the next big technology revolutions. Much like the PC was 30 years ago. There have been major advances in desktop 3D printing (e.g. ​Maker Bot) yet uptake of desktop CNCs has lagged despite the availability of ​cheap CNC machines. One of the major reasons for this is a lack of Open-Source simulation and CAM (3D model to tool path conversion) software. CAM and NC machine simulation present some very difficult programming problems, as is evidenced by 30+ years of academic papers on these topics. Whereas, 3D printing simulation and tool path generation are much easier. Such software is essential to using a CNC.
 
-Being able to simulate is a critical part of creating CNC tool paths. Programming a CNC with out a simulator is cutting with out measuring; it's both dangerous and expensive. With OpenSCAM in the loop you can preview the results of your cutting operation before you fire up your machine. This will save you time and money and open up a world of creative possibilities by allowing you to rapidly visualize and improve upon designs with out wasting material or breaking tools.
+Being able to simulate is a critical part of creating CNC tool paths. Programming a CNC with out a simulator is cutting with out measuring; it's both dangerous and expensive. With OpenSCAM you can preview the results of your cutting operation before you fire up your machine. This will save you time and money and open up a world of creative possibilities by allowing you to rapidly visualize and improve upon designs with out wasting material or breaking tools.
 
 See http://openscam.com/