Org mode + Empty checkboxs by default + refactor

Refactor

This version introduces a refactor to bullet detection - which for the most part be invisible for the user but make it easier for other developers (and myself) to read the code. Always a worthy goal!

Checkboxes

This update also introduces empty checkboxes by default e.g.:

Before

- [ ] get milk
- [x] get cow<CR>
- [x] 

After

- [ ] get milk
- [x] get cow<CR>
- [ ] 

Org mode

This was introduced in 1.1.0 but improved here. This will allow org mode users to have star bullet points such as:

*** do a thing<CR>
*** 

Thanks @hut