This is a backport release that brings the most essential changes and
bugfixes from v0.6 to currently used in at least one real project v0.5.

Notable changes:

 * parser: fix memory leaks (Alexey Orlenko)
 * parser: fix bugs in JSRS parser (Alexey Orlenko)
 * src,build: improve the native module subsystem (Alexey Orlenko)
 * build: compile in ISO C++11 mode (Alexey Orlenko)
 * parser: fix a possible memory leak (Alexey Orlenko)
 * parser: make parser single-pass (Mykola Bilochub)
 * parser: improve string parsing (Mykola Bilochub)
 * parser: fix bug causing node to crash (Mykola Bilochub)
 * connection: check that method arguments exist (Alexey Orlenko)

PR-URL: https://github.com/metarhia/JSTP/pull/118
Reviewed-By: Mykola Bilochub <nbelochub@gmail.com>