Automation of CSS compilation, fixed .gitignore build issue

The grabbing of dependencies and compilation of SCSS can now simply be
done with a:

poetry run task compile-css

before a:

poetry build

When building from source. The issue where the .gitignore had to be
removed before building has been fixed, too.

scss/get_node_deps.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+
+import subprocess
+from pathlib import Path
+
+def runcmd(cmd):
+    proc = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE)
+    return proc.communicate()
+
+print('Installing npm packages')
+
+root_path = Path(__file__).parents[1]
+runcmd(f'npm install --prefix {root_path}')
+
+if (root_path / 'node_modules' / 'cleancss').exists():
+    print(f'Installed successfully in {str((root_path / "node_modules").resolve())}.')
+