libfoundation: Add accessors to add codepoints into strings.
[[ Valgrind ]] Use Memcheck macros to mark pooled MCValue buffers.
[[ Docs ]] Add a 'docs/specs/' directory.
[[ thirdparty ]] Update submodule to latest 'develop' branch.
Merge pull request #1440 from peter-b/misc-valgrindpools

[[ Valgrind ]] Use Memcheck macros to mark pooled MCValue buffers.
Merge pull request #1391 from peter-b/misc-unicodestring

libfoundation: Add accessors to add codepoints into strings.
Merge pull request #1482 from peter-b/docs-specsdir

[[ Docs ]] Add a 'docs/specs/' directory.