Update _version.py - bump version to 2.8.0

Merge pull request #153 from adafruit/paho-v1-compatibility

Paho v1 compatibility

Update _version.py - fix pip

Merge pull request #131 from lcmcninch/get-pages

Implement a means of getting more than 1000 data points

Merge pull request #136 from cj8scrambler/master

Add support for dashboards, blocks and layouts

Merge pull request #125 from brentru/specify-feed-in-group

Add ability to create feed within a group

Merge pull request #107 from brentru/fix-subscribe-callbacks

MQTT_Client: Set QoS Level, Handle Subscription Callbacks

Merge pull request #96 from brentru/new-time-endpoint

Add new IP-based time endpoint

Merge pull request #95 from brentru/fix-time-parsing

Fix on_message parsing

Merge pull request #93 from brentru/enhance-send-data

Enhanced send_data method