make test/assert.rb cruby compatible
add test/bintest.rb
add conf.enable_bintest and run_bintest
add regression for #1564
add regression for #1572
add regression for #1563
enable bintest for travis CI
add a comment for enable_bintest in build_config.rb
use mrb_bool, FALSE and TRUE more

It doesn't matter to me if one is using FALSE/TRUE instead of 1/0
but I prefer a type (alias) which emphasizes boolean vars to int.
I changed 1/0 to FALSE/TRUE anyway.
fibers cannot cross C function boundary; close #1680
Remove warning
Merge pull request #1682 from mattn/remove_warning

Remove warning
better codedump format
Fiber.new{break} caused SEGV
disable LocalJumpError test since the code causes SyntaxError (not LocalJumpError) on CRuby
add RUBY_VERSION to notify syntax compatible version
pass gem_flags_after_libraries
Merge pull request #1683 from take-cheeze/gem_flags_after_libraries

Pass forgotten variable gem_flags_after_libraries to tool's linker.run.
Add pluggable versioning by mruby-version
Fix release date