Clean up some dragdrop code in PTYTextView
Put underscore prefixes on asciiAntiAlias and nonAcsiiAntialias
Put an underscore prefix on markedText
Put an underscore prefix on lineHeight
Put an underscore prefix on charWidth
Put an underscore prefix on charWidthWithoutSpacing and charHeightWithoutSpacing. Remove unused ivars.
Put an underscore prefix on primaryFont and secondaryFont
Put an underscore prefix on mouseDown
Put an underscore prefix on mouseDragged
Put an underscore prefix on mouseDownOnSelection
Put an underscore prefix on mouseDownOnImage
Rename theImage to _imageBeingClickedOn
Put an underscore prefix on mouseDownEvent
Remove showCursor ivar
Rename blinkShow to _blinkingItemsVisible
Change lastBlink into a NSTimeInterval and rename it to timeOfLastBlink
Convert oldCursorX and oldCursorY into _oldCursorPosition
Put an underscore prefix on showTimestamps
Put an underscore prefix on markImage
Put an underscore prefix on markErrImage