Added post-jump-hook as org-reveal

Use #+TITLE property if it exists

Closes #3

See merge request tygrdev/boxy-headings!7

NEWS + siblings

- Added NEWS file
- Fixed bug where sibling relationships were not being added to child headlines.

See merge request tygrdev/boxy-headings!6

v2.1.1

Fix typo that caused 'left' and 'right' to not be valid REL property values.

See merge request tygrdev/boxy-headings!5

v2.1.0

Bug fixes
* Added org 9.3 dependency for emacs 26.

Improvements
* Generalized `REL` property using regex to match, for example, all of "in front" "in front of" and "in-front".
* Added max visibility option

Fixes #2

See merge request tygrdev/boxy-headings!4

Using regex to match multiple forms of REL. For example 'in-front' 'in
front of' and 'in front' will all be standardized as 'in front of'.

2.0.0

See merge request tygrdev/boxy-headings!3

Updated elpaignore

See merge request tygrdev/boxy-headlines!2