Add "File>New" submenu for creating new documents.

[DrewNaylor]

With this pull request, the user can now create new files in some Office programs from the File>New submenu.

The File>New submenu in UXL Launcher is based on the overall organization of the LibreOffice 4.4.3.2 File>New menu.

Each entry has an icon based on the application it launches. The icons are sourced from the small icons used in the Quickmenu.

Available options include:

• Microsoft Word document
• Microsoft Excel worksheet (macro sheet)
• Microsoft PowerPoint presentation
• (separator)
• Microsoft Outlook email
• Microsoft Outlook contact
• (separator)
• Microsoft Publisher publication

Microsoft Access database creation and Microsoft OneNote-related tasks are not available yet.

• For Access, it's because I can't figure out an easy way to create a new database by using command-line args instead of complicated workarounds.
• For OneNote, it's because I feel that most users would rather use the OneNote interface to create new pages, sections, and notebooks.

The "(macro sheet)" in the Excel entry is because of this:

"Microsoft doesn't provide a command to just create a new Excel workbook other than one that also adds a macro sheet to the new workbook.

Because that command is used here, you'll see a macro sheet at the bottom, but you can just add a regular sheet and delete the macro one."