Updates submodules
[BASH] Relative path

Adds the function relative_path that can be used to construct paths that are relative to a given base path.
[BASH] Dotfiles Linking & Submodule Updating

The function dotfiles now support linking and submodule updating.
[BASH] Dotfiles Editing

Removes convenience tasks since changes have to be committed anyway and for that its better to cd into the directory anyway.
[BASH] Webinstall Simplification

The web installer now loads the entire bash environment and uses the dotfiles function directly to perform most of the installation.