Add firmata ble support using littleb library#604

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shiranbm wants to merge 9 commits intoeclipse-mraa:masterfrom

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Commits on Jun 9, 2016

Added initial changes needed for using littleb in mraa
shiranbm
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Commits on Jun 10, 2016

Added all basic functionality needed for connect write and read over ble
shiranbm
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Commits on Jun 12, 2016

removed debug prints
shiranbm
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Commits on Jun 13, 2016

Commits on Jun 14, 2016

Changed all fprintf to syslog
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Commits on Jun 15, 2016

Added back FIRMATABLE option to cmake and sources to avoid compilation errors when littleb is missing
shiranbm
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Commits on Jun 16, 2016

changed firmata ble related code to match new littleb api
shiranbm
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Commits on Nov 3, 2016

Merge remote-tracking branch 'upstream/master'
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