Move CaptionWordSelectedEventArgs Class

Moves the specified class to EventArguments.cs. Adds several comments
and #region folds.
Add Check to MarkupController.LoadWord()

Checks to see if there is an emotion set for this word.
Add Set Groupbox Methods

Adds methods to set and enable the GroupBoxes. Adds Documentation for
them as well.
Refactor Files

Re-indent align assignments.
Change Default CaptionWord Intensity

Changes the default CaptionWord Intensity to low. Disables GB_Intensity
when emotion is set back to none.
Change Selected CaptionWord Highlight Text

Changes CaptionWord highlight text so that it matches the default
Windows selection colours.
Remove Tabs From Caption.cs
Add CaptionStyle.cs

Adds CaptionStyle, which is a class meant to display marked up captions
in the EnACT Editor.
Add Caption.Clear()

Adds Caption.Clear(), which replaces the base class' implementation of
the same method, as RichTextBox.Clear() is not virtual.

CaptionTextBox now highlights words as soon as they are loaded into the
text box.