sys: use typedef for `struct bloom_t`
`bloom_t` is defined as a struct.
`_t` can mislead the user to think of bloom_t
as a typedef (see our coding conventions) instead of a struct.
Thus, I modified `struct bloom_t` to be a *typedefed* struct.

Another solution would be to rename bloom_t to sth. like bloom_s
everywhere and use `struct bloom_s` instead of `bloom_t`.
cpu/boards: completed GPIO driver for sam3x8e

- adjusted peripheral conf for udoo and arduino-due
- added gpio_init_int()
- added interrupt service routines
- fixed gpio_read()
- added clock enable for gpio_init_in()
board/yunjia-nrf5182: adjusted openocd.cfg
Merge pull request #1684 from haukepetersen/fix_yunjia_openocd

board/yunjia-nrf51822: adjusted openocd.cfg
cpu/nrf51822: adjusted default stack sizes
Merge pull request #1685 from haukepetersen/fix_nrf_stacksizes

cpu/nrf51822: adjusted default stack sizes
Merge pull request #1679 from cgundogan/bloom_t_as_typedef

sys: use typedef for `struct bloom_t`
Merge pull request #1486 from haukepetersen/fix_sam3x_finish_gpio

cpu/boards: completed GPIO driver for sam3x8e
dist: pyterm control server (incl. support for multiple testbeds)
Merge pull request #1610 from phiros/feature_pytermcontroller

dist/pyterm: control server incl. support for multiple testbeds
iot-lab_M3: fix numof uart
Merge pull request #1686 from mehlis/iot-lab_M3-fix-numof-uart

iot-lab_M3: fix numof uart
lint: limit maximum length of input via scanf
Merge pull request #1687 from N8Fear/invalidscanf

lint: limit maximum length of input via scanf