[MRG] Add more loading messages

[betatim]

Adds a few more "waiting for launch" messages.

I tried to add a full stop at the end of each message as I think it looks weird to not end a sentence

cc @choldgraf

[choldgraf]

lgtm other than that closed link tag. thanks! i wonder if at some point we should add fun ones in there...

[choldgraf]

for some reason github says I dont have push permissions on the inline commit, so once you add it, then Ill merge

[betatim]

for some reason github says I dont have push permissions on the inline commit, so once you add it, then Ill merge

Thanks for spotting this! The same happens to me as well with suggestions and not being allowed to commit them. But not on all and every repo so I haven't yet been able to work out what we are doing wrong. My guess was that this happens when the "Allow edits from maintainers" box wasn't ticked but for this PR it is ticked ... so I am fresh outta ideas :-/