Show line numbers.
Highlight matched and mismatched parenthesis.
Fix comment typing.
Load color theme before others UI configurations.
Add an empty space after line numbers.
Use parts of the filename to make buffer names distinguishable (instead of using `<2>`, `<3>`  etc).
Enable display time.
Enable syntax highlighting for older Emacsen that have it off.
Fix comment typing.
Merge branch 'ui-improvements' into develop