Ability to control building of all examples.

Only Triangle is built by default.
Mention GCC 4.4, 4.5 and MSVC support.
New text example.
Updated toolchains submodule.
modules: updated FindCorrade.cmake from Corrade repository.
Unified example titles.
text: no, this word doesn't belong here.
text: "+" character is sometimes also needed.
text: reserve even more to be sure.