[STM32L0] Update version in files, add Cube driver release note
[STM32L0] Update registers map file
[STM32L0] Remove useless files
[NUCLEO_L053R8] Update GPIO structures

Due to latest registers map file used.
Restructure and cleanup targets.py for easier navigation
Remove "Silicon" from comments
[TARGET_DISCO_F334C8] reorder structure - part1

Moving targetspecific files to new folder in new structure
[TARGET_DISCO_F334C8] reorder structure - part2

Removing cmsis files.
Merge pull request #647 from screamerbg/master

Tools: Restructure targets.py for easier navigation
Merge pull request #644 from bcostm/master

Targets: Nucleo: Update of STM32L0 Cube driver + NUCLEO_L053R8 hal
Merge pull request #650 from ohagendorf/reorder_f3xx

Targets: DISCO_F334 - Reorder f3xx
[STM32L0] Replace NULL by HAL_NULL in STM32Cube driver for IAR

- Fix issue #482 for STM32L0 devices
- Change release note file in text format and add changes for mbed
Merge branch 'master' of https://github.com/mbedmicro/mbed
[NUCLEO_L053R8] Add IAR exporter
[LPC824] Fix serial interrupt issues

Basically, this is same fix as
https://github.com/mbedmicro/mbed/pull/633
* Fix issue by handling interrupt type (TxIrq and RxIrq)
* ISR now correctly refers INTSTAT instead of STAT to get interrupt
cause
* Disable interrupt when updating vector table
* Tested by issue #616 test cases and serial_interrupt test
Merge pull request #655 from toyowata/master

Targets: LPC824 - Fix serial interrupt issues
Merge pull request #654 from bcostm/master

Exporters: STM32L053R8 - IAR exporter