Version 0.4.0

Added a list-based tags feature similar to org-mode
Complete rewrite of the outline math plugin.
Added colorscheme option to vimoutlinerrc and directory
Modified to install.sh to: 1. Turn off backup functionality.
2. Remove old backup clutter. 3. Remove old vo_base.vim files from
syntax, ftdetect and ftpluginAdd VimOutliner icons to the repository.
Updated TODO.otl
Moved README.detailed to doc/votl.txt to make Pathogen working.
Added information on pathogen installation to INSTALL file.
Added syntax conceal for math equations. Concealed equations appear
 as µ
Add VimOutliner icons to the repository
Add votl_maketags manpage
Bug fixes, corrections and updates