SD::Log Overflow bounds checks and removing Arduino Strings

[ReidP-source]

Features of Log():

• Escape character handling for objects and CSVs ("," , "\0" , "\r" , "\n" , ' " ' )
• Log now returns true on successful writes
• Used FNV1A 64 bit hashing to check module names in files. Creates a new file if the modules have changed.
• Buffer agnostic appending to prevent overflows. Large documents will be truncated. Once memory pools are implemented we can use a producer/consumer pipeline to store larger documents with limited buffers.

Features of buildSchemaHashes():

• Takes two variables (init as 0) and converts to two 64 bit hashes with different seeds.
• Creates a hash pair for every module currently in the file and document
• Compares the hashes.
• Differing hashes indicate the modules have changes and a new file will be started.

Stress test results

https://drive.google.com/file/d/12Fc_cr8wg9ZvRylpuSW3uYzq9tB_bCWe/view?usp=sharing