Fold text improvements, multibyte and width.

Multibyte improvement is with replacing strlen() with strdisplaywidth()
which considers multibyte characters to be one space, so that the dashes
are aligned properly.

Fixed a small typo in the documentation by changing references to
"g:votl_modules_load" to "g:vo_modules_load".

Added two options for .vimrc/.vimoutlinerrc with respect to fold text,
the first one is "g:vo_fold_length" which is either "max", in which case
the fold text is padded/trimmed to the window width, or an integer, in
which case the fold text is resized to that width, the default width
being 58, as it was before.
The second option is "g:vo_trim_string" which takes a string with which
the fold text is trimmed to the set length. This option exists because
the user may prefer to use something like "(more)" or "…" instead of the
default ellipsis (...).
However, because I did not know where to document these two options in
the documentation, these features are undocumented, yet.
Merge pull request #22 from KoviRobi/development

Replaced len() so it works with multibyte chars.
- Small correction in the text
Merge branch 'development' of github.com:vimoutliner/vimoutliner into development
- Clarify some installation instructions
Small corrections to install.sh
Updates to CHANGELOG
Updated version information to 0.3.7 and removed some unecessary text.
Updated version information to 0.3.7 and removed some unecessary text.
Merge branch 'development' of github.com:vimoutliner/vimoutliner into development
Updated title
Move scripts to correct folder
Remove directory
Add plugins in correct folder
Delete plugins from ftplugin folder
Updated with more settings for plugins
Update for vimoutlinerrc
Updated
Move obsolete hoist plugin to prev directory
Merge branch 'development' of github.com:vimoutliner/vimoutliner into development