gitignore more project files

And sort one of the lists alphabetically.
stm32: adc.h regression: Add missing register definitions

The adc unification pull left out some of the shortcut definitions for
ADC1.  See 27bc12de61f8c75425efcf8a61d8ca4a5e4b01b5
cm0 doesn't support sync operations

So remove the warning, the sync code is already left out of the cm0
builds.

Fixes #291
Update README to match all supported families
stm32f1: Add missing peripheral base address for F100
Clarify toolchains and install steps

Including removing the extremely unhelpful DETECT_TOOLCHAIN option.
sync: use matching #ifdefs in source as in header

Fixes github issue #298
stm32f1: Fix RCC CAN defines

Thanks to Марко Краљевић <krasnaya.zvezda@gmail.com>
[f3] add USART_SR_x defines for common status flags

enables the use of usart_get_flag(USARTx, USART_SR_x) on F3 just like on F124

closes #283
libopencmsis: Fill in missing CMSIS interrupt links

And correct a minor typo in the generated code.
stm32/flash: Make comments match reality

Copy/paste commentary with wrong sizes.
stm32/dac: Follow ref-man guidelines on GPIO config

GPIO pins should be configured for Analog IN on virtually all families
to reduce parasitic consumption.

Reported-by: Roger Wolff <R.E.Wolff@BitWizard.nl>
stm32/f0: DMA base address compatibility tweak
usb/stm32 added NOVBUSSENS bit definitions
usb/stm32: Add top level commentary for scope

Remove some unncessary commentary and fixed bit fields introduced earlier via
insufficient review.
[stm32] implement i2c_reset using rcc_periph_reset_pulse

this also adds support for I2C3 in i2c_reset
[stm32] fix i2c_reset

rcc_periph_reset_pulse needs RST_I2Cx instead of RCC_I2Cx as argument
see also #329
[stm32] fix dox for rcc_periph_x

closes #329
add MSC (Mass Storage Class) support
Allow more than one usbd_register_set_config_callback

In a composite device if one want to separate code
for each interface, usbd_register_set_config_callback
can now register more than one callback.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>