[YAGGLER/TOOLS/STRING]: added some comparison operators to the string class (!= and ==)
[YAGGLER/COMMON-INTERFACE]: uniformization of the call interface over gl elements
[YAGGLER/TOOLS/TYPE_AT_INDEX]: added a neat tool allowing to know the type at some index in an tpl argument pack.
[YAGGLER/TOOLS/TUPLE]: now the tuple could return a non-const ref
[YAGGLER/SHADERS]: renamed get_shader_id() to get_id(), added the functions to query a (ct) shader at a given index in a program
[YAGGLER/TOOLS/TUPLE]: now the tuple could return a non-const ref
[YAGGLER/SHADERS]: removed references to neam::cr::string (and removed this header).
[CR/STRING]: removed references to cr::string every where.
[CR/STRING]: removed references to cr::string every where.
[YAGGLER/SAMPLES/DEV]: added the shader's 'append_to_additional_strings()' call to the dev sample.
[KLMB/YAGGLER]: Created the base header.