A few fixes and started working on docs.

package/package_info.py

@@ -64,6 +64,22 @@ class PackageInfo:
             raise DependencyInfoError(f"Cannot find dependency {package_name} in {self.name}.")
         return self.dependencies[package_name]
 
+    def get_dependencies(self) -> list[str]:
+        """Hand out all the dependencies in order of suitable build
+            Those without any dependencies will be first, then the ones depending on the above
+        """
+
+        deps_0 = set[str]()
+        deps_1 = set[str]()
+
+        # I should be recursive here but right now I'm too lazy for this
+        for name, info in self.dependencies.items():
+            if len(info.dependencies) == 0:
+                deps_0.add(name)
+            else:
+                deps_1.add(name)
+        return list(deps_0) + list(deps_1)
+
     def dependency_path(self, package_name: str) -> Path:
         """Give the path underneath which the package, according to its version, is installed"""
         if package_name not in self.dependencies: