FIX. Maths operators do not clone correctly.
Slightly improved ultrasonic block

Better picture.
Use 'long' not 'int for timing else overflows after 54cm
LCD Display Blocks

Add Blocks to create and control generic LCD displays. I2C and parallel interfaces.
Fix. Header lines generated out of order (needed for above to work)
Move 'tone' blocks to 'Pins' draw because they set a pin's state.
Change 'Utilities' draw to 'Generic Hardware' and improve color.
MessageBlock: add <&space> command to allow space at start or end of messages
MessageBlock: add <&nothing> command to allow apply settings without 'printing'

Correct some of my previous daft coding in old 'utilities' draw.
Merge pull request #71 from TonyCallear/LCD-Displays

Lcd display blocks. Move tone blocks. Tidying up
Merge pull request #70 from TonyCallear/master

FIX Issue #39 Out of order CodeBlocks
Merge pull request #67 from TonyCallear/FIX.-Maths-operators-do-not-clone-correctly

Fix. maths operators do not clone correctly
Merge pull request #68 from TonyCallear/Improve-Ultrasonic

Slightly Improve ultrasonic Block
Merge remote-tracking branch 'upstream/master'