Delete the old non hidden config files if they are present
Delete the old non hidden config files if they are present

As a result of PR #53 the color scheme file names were changed from:
  SBSCompareScheme.sublime-color-scheme
  SBSCompareTheme.tmTheme
to:
  SBSCompareScheme.hidden-color-scheme
  SBSCompareTheme.hidden-tmTheme

Deleting those old files (if they exists from previous versions of this
package) prevents to show them up in the selection dialog of:
  Preferences -> Color Scheme...

Also, if those left files were malformed (0 bytes, as a result of the
bug fixed with PR #55) opening that dialog threw this error message:
'Error loading colour scheme Packages/User/SBSCompareTheme.tmTheme: Bad XML'

DougTy/sublime-compare-side-by-side