Added update check on open - Closes #8

Added an update check on startup

If an error occurs during the update check the user will be asked if
they want to be taken to the macros release page
Changed buttons - Closes #4

Rearranged buttons
Removed "Clean" button
Changed button text
Closes #5

* Removed error message while checking for updates if you have the
latest version
* Changed the selected cell after running first macro
* Added updater