add C Library Wrapper to D-Shell
fix license
moving functions to libnative
refactoring in LibNative
support shell style single line comment
fix Checkcast
moving native language handlers to LibNative
Merge branch 'master' of github.com:GreenTeaScript/GreenTeaScript
move shell style comment to DShellGrammar
adding ARGV for getting command line options
Merge branch 'master' of github.com:GreenTeaScript/GreenTeaScript
basic support background job
support timeout
fix SubProc.kill()
fix try-catch bug
fix dshell exception
fix trace requirement message
add dshell script to Makefile