add `subscribe` method
add `subscribe` docs
Merge pull request #8 from techmakesense/master

add subscribe method
Update readme.md
version bumped
add `getRoster` method
handles incoming subscription request
add docstring to `getRoster` method
add doc for `acceptSubscription`
add `unsubscribe` method
add `acceptUnsubscription` method
add doc for `unsubscribe` methods
Merge pull request #9 from techmakesense/master

Handles subscription requests
version bumped 0.1.8
Add status text

http://xmpp.org/rfcs/rfc3921.html#rfc.section.2.2.2.2
Add example of status text
Add information on status text to readme
Merge pull request #10 from Daniel15/add-statustext

Add status text to "buddy" event
version updated
fixed some dependancies