bumped version to 0.9.6

bumped version to 0.9.6-beta

store hostnames in message counts base64 encoded

fixes #SERVER-84

bumped version for second preview release

updated VERSION for preview release

this push failed yesterday: reverted use of patched syslog re-itroduc…

…ing old behavior or previous version. this change leads to release of 0.9.5p1

disable AMQP by default in graylog2.conf example #NO_ISSUE

that sucked

skip possible additional field _id as it could cause trouble with sta…

…ndard MongoDB _id field. also a test for that