Added AUR package

[vestingz]

Just discovered this, liked it and quickly made an AUR package here, in case you want to add this to the README :)

[soywod]

Thanks a lot dude :) I update the wiki right now!

[EDIT] here it is https://github.com/soywod/himalaya/wiki/Installation#from-aur

[vestingz]

No worries :) Thank you for this nice software!

[remche]

@vestingz the package is broken since tests wont run if there is no imap server running on localhost.

[soywod]

Yes indeed, integration tests should be discarded: cargo test --lib.

[vestingz]

Thanks for the heads up! :) I just pushed the fix to the AUR.

[soywod]

Thanks @vestingz!