Added exceptions to bind and info_search so that ruby doesn't crash in
the event of internet connectivity issues or ldap being down.
Added exceptions twice, only needed once. Not a gamebreaker, will push
up to Crawford's repo with another commit.
Added TIMEOUT exception, and stopped the exception from retrying a
search when ldap is down. Now it just returns nil and doesn't unlock.
Merge pull request #20 from jeid64/master

Exception handling for LDAP