Stcgal

- Add DTR autoreset feature
- Add USB15 protocol for USB based bootloaders on STC15W4 series
- Add STC12B protocol for another set of STC12 variants
- Add protocol autodetection, enabled by default (laborer)
- Introduce DEB and RPM packages
- Update MCU database and fix some inconsistencies
- Raise handshake baud rate to 2400 to improve compatibility with some FTDI UARTs
- Fix STC12/STC12A option packet format
- Various fixes and improvements

- Fix compatibility issues with some STC 15 parts

- Support for STC 89/90/10/11/12/15 series MCUs
- Flash and EEPROM programming
- Options can be read and set
- RC frequency can be trimmed on STC 15 series parts
- And much more, for instance detailed part information