Updated program to v1.1
Hotfix for FormatException on bitrate conversion

This should temporarily fix the bitrate conversion when the user fails to
fill out every field.
Added subsCheck function

This function will check if a temporary subtitle file exists, and deletes
it. This will help if the program is killed before it finishes converting.
Added subsCheck function call

This should fix the issue where the program would lock up if the temporary
subtitle file was not deleted.
Changed position of subtitle check

This should fix the issue where subtitles were getting cropped out if crop
was used in junction with subtitles.
Added color changing rules to txtCrop

This will change the color to black when the user enters the control, and
will turn it back to silver/gray if it is left blank.
Added a MessageBox for Ultra quality

I got a few messages of people asking me how to stop Ultra quality, so I
added a warning since there currently is no way to stop it.
Added checkAudio to the clear button

This was simply forgotten when originally implemented.
Merge branch 'hotfix-1.1'