Shellp

This release fixes issues preventing ShellP from being properly installed.

This is a major update to ShellP and the second alpha release. There are so many new features:

* Argument functions (see docs for information)
* Ability to use environment variables in commands, like this: `ls $MY_VAR`
* Pipes are now supported: `ls -R / | less`
* Auto suggestion for command input (use right arrow key to fill it in)
* Command history that you can navigate using up and down arrow keys
* You can now edit command input using left and right arrow keys or by clicking your mouse
* Commands are syntax-highlighted as you type

There are also some other minor changes.

ShellP now only works on Unix.

ShellP is now in alpha instead of pre-alpha. v0.1.0 is a major new update that is more configurable and in many ways better than other shells. It also has new documentation.

Thank you so much for downloading ShellP! [This page](https://pypistats.org/packages/shellp) shows that ShellP has been downloaded so many times, and it is hard to believe the amount of downloads it shows. I didn't expect anyone to download it.

This is the second pre-alpha release. The Readme file has been completely changed with this release and gives you information on how to use ShellP. Here are the other changes:

* Custom user config now works; it wasn't working in v0.0.0
* Installation of ShellP now works; a typo in setup.py was preventing proper installation of v0.0.0
* The `cd` command now works
* Changed the `version` value for `ps1` to `shellp_version`
* The `symbol` value for `ps1` is now `` when you're logged in as ~groot~ root, just like other shells
* Improved exception handling
* Ability to ignore user configuration by passing the option `--no-user-config` or `-U` when starting ShellP
* Added startup message that shows you the version of ShellP that you have installed

I also added some new values you can use in `ps1`:

* `bell` - the BEL character; ASCII character number 7
* `git_branch` - the current branch of the git repo you are in, or a blank string if you aren't in a git repo
* `hostname` - the hostname of the computer that ShellP is running on

This is the first pre-alpha release of ShellP. It gives you the ability to configure ShellP using a Python script in your home directory (this feature hasn't been tested). It isn't as good as other shells such as Bash yet, since it is basically just a program that puts your input into `os.system()`. Currently, the `cd` command does nothing. But it does support operators for doing things like the pipe operator for chaining stdin and stdout of multiple commands, since that is supported by `os.system()`.