eggShell.readJSON & Flatten / Unflatten JSON behavior

[rajsite]

• Static allocated string in EggShell_DataReadString and EggShell_DataWriteString is likely causing aborts() when Vireo is rebooted or re-run using a new user shell. Calling readJSON between reboots causes abort #275 and possibly Aborts caused when using the same Vireo instance after an http 404 #163

• readJSON and Flatten / Unflatten from JSON should always return valid, safe UTF-8 strings. readJSON should always return valid, safe UTF-8 strings #366

• readJSON API should encode 64-bit integers as strings to improve interoperability. ReadJSON should encode 64-bit numbers as JSON String type #364

• C-based runner to test ReadValueString and WriteValueString Separate the ReadJSON and WriteJSON tests #254

• EggShell_WriteValueString tests for 2D arrays that cause the Array to grow do not behave correctly. EggShell_WriteValueString does not grow 2D arrays correctly #365

• Test more around +0 vs -0 behaviors. Improve support for +0 and -0 behaviors #367