Refactor Code

Adds in line breaks to keep lines under 120 chars long.
Remove CaptionView Column Number Constants

Removes the column number constants from CaptionView, as it is better
to refer to the columns by name and not position.
Change CaptionView Sizing

Added minimum widths to 4 columns as well as changing the default
autosize mode to autofill.
Add CaptionTextBox.NoSelection Event

Adds the NoSelection event, which is fired when the selection is
changed but there are no CaptionWords containted in the current
selection.
Add Null Check to OnSelectionChanged
Add Miscellaneous Documentation
Change CaptionWordList.GetAsString

Method no longer appends space after last word.