RFC6330 lets you have 256 blocks at most. Check at
the interleaver definition.

The C interface did not check for correct C++ initialization.
fix that, too.

Signed-off-by: Luca Fulchir <luker@fenrirproject.org>

Also: tiny fix on an interleaver condition.

Signed-off-by: Luca Fulchir <luker@fenrirproject.org>

lots of bugfixes, also due to the creation of a couple of examples
for the C and C++ interface. Updated documentation accordingly

Signed-off-by: Luca Fulchir <luker@fenrirproject.org>

Also small diff to documentation

Signed-off-by: Luca Fulchir <luker@fenrirproject.org>

Make clang happy, let's compile with
-Weverything!

Signed-off-by: Luca Fulchir <luker@fenrirproject.org>

Switched to iterators instead of std::vector.

Now it's possible to build the C interface, and
you can use any container you want.

Signed-off-by: Luca Fulchir <luker@fenrirproject.org>