Restructure Item>Text>Article

Item: title and keywords
Text: publisher and year
Article: contributors and journal

and all basic gets/sets

Signed-off-by: jnickg <jnickg83@gmail.com>
Add filepath member to Text
Create Folder class; Add members to Cabinet

Cabinet:
	unsorted Items
	folders
	keyword mapping

Folder:
	unsorted Items
	subfolders
	keyword mapping