v1.3

• #38 add SetChildren for prefix completer interface
• #42 improve multiple lines compatibility
• #43 remove sub-package(runes) for gopkg compatiblity
• #46 Auto complete with space prefixed line
• #48 support suspend process (ctrl+Z)
• #49 fix bug that check equals with previous command
• #53 Fix bug which causes integer divide by zero panicking when input buffer is empty