GMail does not support multiple accounts in the same browser

Added webapps-applications, don't worry about it for now Maxim but you may be getting some new API soon :)

It requires integration with web credentials (for launcher).

Maxim: Accounts have different URL's that I think aren't correctly supported by the script:

https://mail.google.com/mail/u/0/#inbox (fisrt account, "0")
https://mail.google.com/mail/u/1/?shva=1#inbox (second account, "1")

I would like to fix this in just the Messaging Indicator at least with some sort of Unity.setAccount API, and grouping in to different indicate servers. Unfortunately the .desktop file is used as the primary key everywhere for the indicator, and to extract the server label from....so to do this we will have to generate a bunch of extra .desktop files...I suppose if we do it in a temporary location it's not so horrible. If no one has any objections I will probably take a shot at this today or tomorrow, already have the setAccount API in a branch, just need to refactor the .desktop file generation.

All the .desktop file stuff is a little nicer now (through the UnityApplicationInfoInterface)...so it will be possible to implement this now. Probably best to do the indicator model improvements first. I don't feel that this is particularly high priority though.

This weeks release is focused on big bugs, for our next round of testing.

Will target indicator improvements for next release, and then this should be a pretty easy addition on top of that for the release after that.

This bug still exists in now released Ubuntu 12.10. If I add any Google account except the first one (numbered 0) to Webapps, launching the webapp just ignores the account number which gives a Google error. The issue is still what comment #3 mentioned:
https://mail.google.com/mail/u/0/ (fisrt account, "0")
https://mail.google.com/mail/u/1/ (second account, "1")

No matter which account is used to create the webapp with, the webapp itself is only able to use the default (which is equivalent to /u/0/).

This also happens with Google+, Calendar, etc. since they all use the same /u/<number>/ format, ie:
https://plus.google.com/u/2/

How to handle this case is addressed in the messaging menu spec, https://wiki.ubuntu.com/MessagingMenu. Will start fixing.