deep sleep and wake-up. GPIO group interrupt, start logic sample see: http://mbed.org/users/okini3939/notebook/low-power-m0/

Dependencies:   mbed

Revision:
0:ae90ac40c518
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+++ b/mbed.bld	Mon Oct 15 05:07:10 2012 +0000
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+http://mbed.org/users/mbed_official/code/mbed/builds/737756e0b479
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