Pointless: install

Installation:

Remember, you can try Pointless online without installing.
To install Pointless locally, you'll need to have Git installed to clone the repository, as well as the Dart SDK.

Installing on Linux, Mac and Windows (PowerShell):

Clone the repository

git clone https://github.com/pointless-lang/pointless.git

Enter the repo directory
```
cd pointless
```
Download Dart dependencies:
```
pub get
```
You can now run the Pointless repl using:
```
dart lib/pointless.dart
```
or supply a path to a file to run; for example:
```
dart lib/pointless.dart examples/beer/beer.ptls
```
(for repl readline support, try rlwrap)

Compiling the interpreter with dart2native:

Compiling the interpreter avoids the startup overhead of the Dart VM.

After performing the steps above:

Linux and Mac:

Run the following commands in the repository root (generates ./bin/pointless):
```
dart2native lib/pointless.dart -o bin/pointless
```
Alternatively, using Make, simply run:
```
make
```
Now you can run Pointless like this:
```
bin/pointless examples/beer/beer.ptls
```
Windows:

Run the following commands in the repository root (generates ./bin/pointless.exe):
```
dart2native lib/pointless.dart -o bin/pointless.exe
```
Now you can run Pointless like this:
```
bin/pointless.exe examples/beer/beer.ptls
```