api version 1.1
api version 1.1

- remove working tree endpoint for simplicity and combine it with program
- add content endpoint for retrieving a file's content
- add license
- other minor changes and improvements

PRIArobotics/hedgehog-ide,PRIArobotics/hedgehog-ide,PRIArobotics/hedgehog-ide,PRIArobotics/hedgehog-ide