v0.0.0-beta-1

Changelog

------------- Version 0.0.0-beta-1 (Jul 2021) -------------------------------------------

With this update there was a lot of redesing with the rendering and also the file formating with the removeal
of the command file out of revi-core. Made a lot of new bugs but I think they were also fixed with the
help of some new test modules. As I work on ReVi more and more things are clear on what should come next
and also what I need to keep in mind for the further.

Added

• Setup for Multiple Windows
• Multiple Buffers so more then one file can be worked on.
• Added a basic Command Mode
• updated mlua crate from 1.2 to 1.3.1
• keybinding gg to jump to top of file
• keybinding G to jump to bottom of file
• Added more test

Fixed

• Cursor moving out of max file's line count.