Merge tag '0.14' into develop

Major refactoring release with

*) variadic CRTP structure for statements (simpler extensibiltiy)
*) massively improved error handling at compile time
Replaced all_t/any_t by MUCH more performant versions
Rewrote any_t to take bools instead of predicate and classes
Rewrote all_t to use bool arguments instead of predicate and classes
Minor cleanup
Added index_sequence (until it can be used with C++14)
Added link to boost mailing list

This where I presented the idea for all_t. According to Louis Dionne,
the fastest implementation around :-)
Used index_sequence to get rid of recursion in interpret_tuple.

Wonderful stuff, shaped after code samples from cppreference and
stackoverflow.
Made parameter_list's bind non-recursive
Added column_index_sequence

This is not necessarily sequential because there might be multi_columns.
Rewrote result_row implementation to be non-recursive

Cool. This is so much easier to understand now!
Merge branch 'release/0.15'