Some documentation fixes.
Fixed documentation (new include file for AEAD).
More Doxygen-compatible documentation (SSL API).
Some more Doxygen API documentation (X.509 processing).
More API documentation (Doxygen format) for EC code.
More API documentation in Doxygen format (block ciphers, PEM).
More Doxygen documentation.
More Doxygen-compatible documentation. Also unified two identical structures.
Added Doxygen configuration file, and converted bearssl_hash.h file to Doxygen format.