Feature/better matching and other improvements

closes #4 - Rescue from stupid syntax errors.
closes #7 - Fix exact matching
closes #5 - Rough matching
closes #9 - throw if you find multiple things
closes #10 - Allow for finding multiple things without an error
closes #3 closes #1 

Also, removed getAllEls. It's kinda stupid. And if we have good finds and good window aliases, then it won't be needed.