Atomic: sort servers by their title

Currently, servers are not explicitly sorted which makes their order
inconsistent due to the underlying storage method of HashMaps. In order
to provide a cleaner look and feel, servers should be sorted by their
titles.

Signed-off-by: jgeboski <jgeboski@gmail.com>
Server: sort conversations by their type and their name

Currently, conversations are not explicitly sorted which makes their
order relative to the order in which they were added. In order to
provide a cleaner look and feel, conversations should be first sorted
by their types, and then by their names.

Signed-off-by: jgeboski <jgeboski@gmail.com>
Merge pull request #16 from jgeboski/sorting

Implemented the sorting of servers and conversations. Passed travis.