bump duktape version for next release
disable legacy compatibility stuff present in 0.9.0 (keep for one release only)
add a minimal setup check to Makefile, also print a notice to users running the developer makefile on other than Linux platforms
simplify panic handling, use DUK_OPT_PANIC_HANDLER instead of DUK_PANIC_HANDLER, add a message to fatal error handler
make default panic handler compilation conditional, describe 'exit method' in default panic handler for clarity
add a Makefile target to run a JS-Interpreter test
add a few more test targets to README