resolve conflict
add assert_{true,nil,equal} methods.
Merge pull request #849 from iij/pr-mrbtest-assert-ext

add assert_{true,nil,equal} methods.
Merge pull request #850 from mattn/pluggable_regexp

Pluggable regexp
Merge pull request #845 from masuidrive/hook_fetch

Added a hook at VM code fetch.
rename hook and macro
remove TT_REGEX and TT_MATCH
Remove DISABLE_REGEXP
Changed debugger hook to disable
Merge pull request #852 from masuidrive/change_default_debug_flag

Changed debugger hook to disable
Merge pull request #851 from mattn/bye_bye_regexp

Remove DISABLE_REGEXP
String#split should honor limit arg
adopt String#gsub to fixed split behavior
Merge branch 'master' of github.com:mruby/mruby
vars must be declared at the start of a block
parser_dump supports NODE_REGEX.
Remove needless comment
update String#gsub test
s must not be freed, removed space in exc msg
Merge pull request #857 from mattn/remove_comment

Remove needless comment