Add the ability to remove Pulse via Install script and switch from curl to wget

[mysy00]

• Switch from curl to wget as not everyone has curl installed and it should be as easy as possible to get Pulse running
• Add a way to easily uninstall Pulse on Linux
  • ./install.sh --remove - to remove the executable installed by the script
  • ./install.sh --remove-all - to remove the executable and all associated directories in the XDG paths
• Add a help menu to the script (since it now offers more options)