message: some fixes to readme
diff: # PhysicalDesign
  This repository track the physical design of the RespiraWorks open source medical ventilator.
  +The physical design encompasses everything that is not software run on the device.
  ## DISCLAIMER
  @@ -9,7 +10,7 @@ This repository track the physical design of the RespiraWorks open source medica
  **This repository contains live documents.
  There are duplicate and alternative items for undecided aspects of the physical design.
  Components may not connect and integrate as intended.
  -RespiraWorks may, or may not compensate you for any of these parts you purchase.
  +RespiraWorks may, or may not compensate you for parts you may purchase.
  If you decide to buy or build anything, do so at your own risk.**
  ## Structure
  