v0.0.8

Supports change color settings
Supports buffer manager
Supports visual block mode
Supports cursor line
Supports type over close parens
Improve filer mode view
Improve file details
Add "z.", "zt", "zb" command in normal mode
Add "ZZ", "ZQ" command in normal mode
Add "dw" command in normal mode
Add "r" command in visual mode
Add help option in command line arguments

Extensive refactoring

Fix #238
Fix #255
Fix #256
Fix #266
Fix #272
Fix #287
Fix #295