Alternative `selectedText` implementation.

It works, in theory, with all applications. Quick and dirty hack.

A better approach would be to export a pasteboard event emitter where
the configuration script can listen waiting for items of certain to be
available. À la node it would be something like this:

pasteboard.on('string', function(item /* copied item */, app /* originating app */( {
    /* do something with item */
})

pasteboard.on('image', function(item, app) {
    /* do something with item */
})

Not sure how to do it in Windows app yet.
Revert a change that has nothing to do with `selectedText`.
readme
readme
readme
consistency
readme
readme
fixed open()
readme
readme
todo
typo
Restores clipboard contents.

It restores the user's previous pasteboard contents after using the
pasteboard for the current selection.
Updated change log.
Merge branch 'master' of https://github.com/djromero/windowsapp into djromero-master

Conflicts:
	README.md
cosmetic changes
more stuff