Fixed irep index overflows, when defining new closure.

Add vs2010.rake

Issue #1137.
In the present implementation, when calling mrb_load_string continuously, irep is not released.
Therefore, a 16-bit index was overflowing.

Don't ignore host when adding libmruby.a to deps

Merge branch 'fix-type-error-message' of https://github.com/h2so5/mruby into h2so5-fix-type-error-message

Add verbose mode to mirb

Update gem application support.

Refactor mrb_str_dump

Replace malloc with mrb_malloc in mrbc

Add NotImplementedError for Kernel.` and Kernel#`

Show version only once with '-v' option in mruby/mrbc

Add validation for C language symbol name

Fix mirb to use readline

although I understand the intntion of 039679f1, consuming all memory in the test program is not a good idea

Add more ISO conformance tests.

Add ARGV constant. It is not required by ISO. Compatibility with CRuby.