Merge pull request #1 from kylesorkness/master

corrected the URL to the Simpletask website
Fix cursor position when adding tasks from filter view #47
Fix error in rec handling
4.1.6
Explainded threshold functionality
Also add t:.. syntax
Update README
Also add t:.. syntax
Add a setting to hide completing checkbox
Fix grouping of threshold date
Generated docs instead of including a Markdown lib
Multiple help files
Updated Changelog
Open http(s):// links in help in external browser
Move document publishing to org-mode
Also export markdown
Updated README.md
Updated README.md
Don't include org mode css
Remove vim files