Fixes to C++ structure based on feedback from website

[krishnangovindraj]

Usage and product changes

Various improvements to the document generation tools to make the C++ and C driver docs on the website more readable

Implementation

All drivers

• Replaces multiple underscores in anchors with a single underscore

C++

• Removes template type parameters from filenames
• Fixes structure of C++ typedefs to reflect grouping them all under a single file
• Remove undesired verbose declaration in C++ class descriptions of templated classes
• Blanket replace < and > with < and > respectively

  C

• Fix duplication of file headers when various struct docs are forced into a single file.

We also seem to achieve consistency between the docs generated on Mac & Linux