CppCMS C++ Web Framework Code

Added missing comments and fixed size() to be const

Fixed issue with temporary file removal

Added test for moving of context between applications and pools

Performance improvements in json parsing

Added testing of raw filter

Now upload filter test is completed

Testing of filter added - incomplete yet

Moved all content parsing code to http::request for both:
- easier filter integration
- putting right responsibility

Workarond of missing off_t

Fixed function definition