v1.2

• Add a demo for checking password strength example/readline-pass-strength, , written by @sahib
• #23, support stdin remapping
• #27, add a UniqueEditLine to Config, which will erase the editing line after user submited it, usually use in IM.
• Add a demo for multiline example/readline-multiline which can submit one SQL by multiple lines.
• Supports performs even stdin/stdout is not a tty.
• Add a new simple apis for single instance, check by here. It need to save history manually if using this api.
• #28, fixes the history is not working as expected.
• #33, vim mode now support c, d, x (delete character), r (replace character)