Supported only on Rust Nightly due to unstable features

Using the history.rs example as the de facto example.  Also bumping version number to publish on crates.io

Implement refreshSingleLine & linenoiseEditInsert.

And introduce Eof to make possible the distinction between
an empty line validated (Enter) and Ctrl-d.

Replace Vec<u8> with a std::String

* Update example to not print UTF-8 code but plain text
* Add a Invalid UTF-8 Error Variant

And attempt to support unicode input.

Fixed strange Blocking action when reading from STDIN

Added travis configuration and script to automatically deploy new docs when there are any changes to master

Completed Error Handling Cleanup