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.
move version info from gems to core; ref #576 #1684
forgot to add new files
add MRUBY_RELEASE info in numbers
Remove notice of early version
Add download link for stable version to README

- add download link of stable version 1.0.0
- remove remark for mruby branch due to non-existence
rename mrb_name_class and make it static
made mrb_define_class to return existing class, with heavy refactoring
Merge pull request #1690 from bovi/patch-2

Add download link for stable version to README
Merge pull request #1689 from Bovi-Li/remove-notice

Remove *very early version* notice
forget to add function prototypes
Store raw stack address in callinfo instead of offset from stbas