add tests of 'self' and remove redundant tests
free memory allocated in __cxa_demangle
refactor JsArrayBuffer
add detail/to_string.h
introduce TypedSet
add Map::entrySet
use Map::entrySet
update option checks
update tools/leak-check.rb
refactor CMakeLists.txt
fix build errors in windows
add JsRegExp::lastIndex
check LIBJ_BUILD_GTEST
delete submodule 'jsoncpp'
refactor CMakeLists.txt
delete submodule 'jsoncpp'
update submodule 'convertutf'
update submodule 'iv'
add String::data
refactor glue::RegExp