Read project property tgit.icon

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Can load project icon from Log Dialog

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Also support icon not just .ico format, such as .png, .bmp, .jpg

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Add icon settings

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Update Changelog.txt

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>