Add JazzScheme to implementations

[codingbum]

JazzScheme website hasn't been updated for years but the repository still get commits regularly. Since you have to build it yourself, i think it's better to link to the repository instead of the outdated website.

JazzScheme is a development system based on extending the Scheme programming language and the Gambit system. It includes a module system, hygienic macros, object-oriented programming, a full-featured cross-platform application framework, a fully programmable IDE and a build system that creates executable binaries for Mac OS X, Windows and Linux. JazzScheme has been used for more than 20 years to develop commercial software.

[lassik]

I'm in favor of adding JazzScheme. But aren't the IDE and GUI libraries the main selling points? We should mention them.

[lassik]

We have a Docker container of the git master but it's Linux-based and IIRC doesn't have the GUI or IDE, or at least I haven't tried to run them.

[jpellegrini]

I agree with @lassik - the IDE an GUI should be mentioned! Other than that, JazzScheme is fine, should be on the list.