Command line tool update.

Usage:
    Compile YukimiScript to Lua:
        ykmc <INPUT_FILE> [--target-<TARGET> <OUTPUT_FILE>] [OPTIONS...]
    Create diagram:
        ykmc dgml <INPUT_DIR> <OUTPUT_DGML_FILE> [OPTIONS...]
    Create charset file:
        ykmc charset <INPUT_DIR> <OUTPUT_CHARSET_FILE> [OPTIONS...]

Options:
    --lib <LIB_DIR>    Include external libraries.

Targets:
    lua                Lua 5.1 for Lua Runtime 5.1 or LuaJIT

Example:
    ykmc ./Example/main.ykm --target-lua ./main.lua --lib ./Example/lib/
    ykmc dgml ./Example/scenario ./Example.dgml --lib ./Example/lib
    ykmc charset ./Example/ ./ExampleCharset.txt --lib ./Example/lib