Bugfix release 2

This release replaces v0.2.7, fixing an issue with Cargo.lock metadata.
Version v0.2.7 is kept in the repository for transparency reasons.

Bugfix release

This release fixes an internal test case using invalid data.

v0.2.6 - Overwrite and byte property release

This release features a new mode, overwrite mode, which allows one to
overwrite bytes of the file as in replace mode, but without constantly
switching back to normal mode. It funtions like insert mode, and it is
reached by pressing `o` or `O`.
Additionally, it contains a side bar which shows information about the
binary content of the file, showing for example the 32-bit integer
interpretation and UTF-8 decoding of the data currently under the main
selection.

v0.2.3 - History release

This release adds support for the undo/redo system.
Additionally, it contains a vast performance improvement for
handling larger files.

v0.2.2 - Initial tagged release

This release has support for basic hex editing capabilities. It can be used to
insert and delete hexadecimal text, yank and paste it and search for simple
patterns. It supports multiple selections and multiple buffers.

Implemented commands:
- hjkl
- g[hjkl], G[hjkl]
- ;
- <a-;>
- <a-s>[bwdqon/?]
- d
- iIaAcC
- ()
- <space>
- rR
- y
- p
- sS
- M
- :q :q! :w :wa :e :db :db! :wq
- Insert mode: <c-n> <c-o>
- Pattern mode: <c-w> <c-o>
- Counts for most of these commands

Please see README for documentation on what these commands do.