fixes #4 by parameterising interrupt and reset pins

[trullock]

Fixed misleading comments
Fixed initSensor parameter comments
Made reset and int pins parameterisable
Set them to defaults which actually work

[trullock]

submitted from master. closing and will reopen from correct branch

[aahr]

Thanks a lot.
FYI:
I now have an error when compiling the Euler script, but didnt have time yet to check details:

libraries\NineAxesMotion\NineAxesMotion.cpp.o (symbol from plugin): In function `_delay(unsigned int)':

(.text+0x0): multiple definition of `RESET_PIN'

sketch\Euler.ino.cpp.o (symbol from plugin):(.text+0x0): first defined here

libraries\NineAxesMotion\NineAxesMotion.cpp.o (symbol from plugin): In function `_delay(unsigned int)':

(.text+0x0): multiple definition of `INT_PIN'

sketch\Euler.ino.cpp.o (symbol from plugin):(.text+0x0): first defined here

collect2.exe: error: ld returned 1 exit status

[trullock]

Yeah my bad, pushed up a cocked up version, see the new PR
#6