Templates: Added properties. The mapleader appearing in menus in now configurable.

- Added properties.
- Added a property for the mapleader used during menu creation.
- Added properties for maps and shortcuts of special menu entries.
- Fixed creation of sub menus. Did not work for some escaped characters.
- Documentation.
- Minor changes.
Awk-Support: Improved the menus. Various bugfixes.

- Menus generated in correct order.
- Menus show the correct mapleader.
- Map creation is triggered by the "FileType" event.
- Fixed tool menu entry if the support is loaded via an "FileType" event.
- Changed priority of entry in menu "Tools".
- Removed unused function: 'Awk_AddMenus', 'Awk_RemoveMenus' and 'Awk_CreateMenusDelayed'
- Minor changes and bugfixes.
LaTeX-Support: Improved the menus. Various bugfixes.

- Menus generated in correct order.
- Menus show the correct mapleader.
- Map creation is triggered by the "FileType" event.
- Fixed end-of-line comment.
- Fixed tool menu entry if the support is loaded via a "FileType" event.
- Changed priority of entry in menu "Tools".
- Removed unused function: 'Latex_AddMenus', 'Latex_RemoveMenus' and 'Latex_CreateMenusDelayed'
- Minor changes and bugfixes.
Vim-Support: Improved the menus. Various bugfixes.

- Menus generated in correct order.
- Menus show the correct mapleader.
- Maps are created for modifiable help buffers, depending on the option "Vim_CreateMapsForHelp".
- Changed map for Vim keyword help: \h -> \hk
- Map creation is triggered by the "FileType" event.
- Fixed tool menu entry if the support is loaded via an "FileType" event.
- Removed unused function: 'Vim_AddMenus', 'Vim_RemoveMenus' and 'Vim_CreateMenusDelayed'
- Minor changes and bugfixes.