iOS implementation, updates to JavaScript API, test program

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Full implementation of iOS plugin, write and notification functions are untested.

JavaScript API updates:

• Functions services, characteristics, and descriptors new return a list of found objects to the callback function.
• Fields "serviceCount" and "characteristicCount" in object Service have been removed.
• Field "descriptorCount" in object Characteristic has been removed.
• Field "device" in ConnectInfo changed name to "deviceHandle".

Test program has been added that runs automatic tests of the API, except for write and notification functions.

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The merge indicator says "Error checking merge status". Did rebase and push -f, don't what the problem might be.