Merge pull request luno#24 from natercioluno/master

update version to 0.0.8

Merge pull request luno#20 from neilgarb/v0.0.7

Release v0.0.7

Merge pull request luno#16 from neilgarb/v0.0.6

Updates for v0.0.6

Merge pull request luno#12 from ShiraazMoollatjie/luno-external-id

Add external_id

Merge pull request luno#11 from Bubblyworld/master

Add sequence field to trades

Merge pull request luno#7 from neilgarb/0.0.3

Release 0.0.3

Merge pull request luno#4 from neilgarb/0.0.2

Release v0.0.2