Emit "initialized" event
Merge pull request #1921 from azazel75:upstream

Emit "initialized" event when config is ready and commands too
document intialized signal and md extensions

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
move things around a little bit

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
document #1291; add @azazel75 to contributors

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>