Hash :2288c25e Author : Date :
2018-12-01T18:37:20
Add G-code language (#1572)
This PR adds the [G-code language](https://reprap.org/wiki/G-code) to Prism
and resolves #1571.
### Features
- All fields from A-Z ([case sensitive](https://reprap.org/wiki/G-code#Case_sensitivity)) and [checksums](https://reprap.org/wiki/G-code#.2A:_Checksum) (`*`).
- [Comments](https://reprap.org/wiki/G-code#Comments) of both the semicolon and parenthesis style.
- [Quoted strings](https://reprap.org/wiki/G-code#Quoted_strings).
- The colon punctuation of [lists (see the example)](https://reprap.org/wiki/G-code#M584:_Set_drive_mapping).