Cursor move at the first char when Up on the first line (and at the l…

…ast char when Down on last the line) (zyedidia#773)

* Cursor move at the beginning of the line when Up on the first line (and at the last character when Down on last the line)

* Fix an issue when Up to a shorter line than current line

Update readme

install the snap with make (zyedidia#747)

* install the snap with make

* set the source-type to git, remove get

* remove extra space

Re-add literate supportg

Add option to disable use of a the primary clipboard

Closes zyedidia#544

Fix string width for different sized tabs

Fixes zyedidia#475

Minor update

Merge

Update docs and readme

Update readme