Export service icon path of each IM account
Remove superfluous presenceAccountUris

Instead, order the results of presence information to correspond to
the order of account information as reported by accountUris and
accountPaths.
Account provider is not directly linked to presence
Change presenceServiceIconPaths to accountIconPaths

It has no direct relationship to presence information.
Merge pull request #125 from matthewvogt/export-icon

Export service icon path of each IM account