Add String.split(char) to split into an array, and add a simple
char const * + lol::String free operator.

It merely performs an std::swap() on both array elements, but it’s
apparently convenient to have.

Using “Array” instead of “array” is now fully deprecated, and I replaced
the Log::Debug() etc. functions with msg::debug() etc. because log:: was
unavailable due to being a maths function.

Added up-to-date copyright notice and BOM to modified files, just in case.

The containers no longer force the user to use the ptrdiff_t type for
size information. For convenience, size() now always returns an int,
and the size_s() method offers a way to handle arrays with more than
2 billion elements. Internally, we still use ptrdiff_t, though.

Since so much code had to be changed, I took the opportunity to get
rid of capitalised accessors for classes that are lowercase.

- removed 0 CR characters
 - removed 1 trailing whitespaces
 - replaced 5 tabs with spaces
 - fixed 7 svn:eol-style properties

Added an unit-test that breaks map+avl_tree