2018q1 release

This release covers everything from the 2017q4 release on 2018-01-07 and has been tested with avr-gcc v7.2.0 and arm-none-eabi-gcc 2017q4 from Arm.

Breaking changes:

• No breaking changes.

Major features:

• ADC implementation for STM32F0
• Block device interface and implementations
• CMake wrapper generator
• STM32L4 PLL configuration

Major fixes:

• Better Python 2/3 compatibility
• Fix HD44780 timing
• Fix AMSYS5915 sensor readings computation

Known bugs:

• xpcc may generate separate IRQ handlers for shared interrupts. See #88.
• GPIO connect on STM32F1 is still broken. See #178 for discussion. The API from MODM will not be backported to xpcc however.
• STM32F107 does not compile due to the HAL trying to remap USB. See #268.
• SCons build system emits multiple non-critical warnings. See #286.
• avr-gcc 7 complains about dynamic initialization put into program memory area. See #314.
• Template encoding issues on Windows. See #345.

New development board targets:

• STM32F030F4P6 demo board as stm32f030f4p6_demo_board

New device drivers:

• SPI Flash SST block device
• Memory block device
• File block device (hosted)
• Mirrored block device

Many thanks to all our contributors:

• Álan Crístoffer (@acristoffers)
• Antal Szabó (@Sh4rK)
• Christopher Durand (@chris-durand)
• Niklas Hauser (@salkinium)
• Raphael Lehmann (@rleh)

See our Changelog for more details.