[Fixes #42] Soft wrap mapping, which disables hard wrap

- SoftWrap() function
- Mapping to call SoftWrap() function
- Mappings to go around wrapped lines as if they weren't wrapped
Merge branch 'master' of github.com:vrybas/dotvim

Conflicts:
	ftplugin/text.vim
[#42] Readme update about new soft wrap mapping