Updated the `Cargo.toml` file and added a `package.metadata.deb`
subsection to define how to build a debian "deb" install file using
`cargo deb`. This will allow debian/ubuntu users to install `alacritty`
using their system's package manager. It also will make it easier to
provide pre-built binaries for those systems.
Also fixed a stray debug line in the bash autocomplete script that was
writting to a tempfile.
* Add manpage
Adds a basic manpage that was autogenerated with `help2man` and then
slightly adjusted with information from the README.md and better
formatting.
* Add zsh completions
Add completions for the zsh shell. These should be complete and even
allow completion of the command inside `--command` and `-e`.
* Add bash completions
The bash completions are almost on the same level as the zsh
completions. The only little thing the bash completions do not do is
complete inside of `--command` and `-e`, instead bash just stops
completion after these options.
* Update readme with manpage and completions
Added the install instructions for the manpage and completions to the
README.md.
Also tweaked the current readme a slight bit because the build section
was structured in a slightly confusing way.
