Add markets and increment version#13

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marcorosa wants to merge 11 commits intodursk:masterfrom

marcorosa:master

Commits on Dec 11, 2017

Commits on Dec 12, 2017

add coinbase exchange
marcorosa
committed

Commits on Dec 13, 2017

add cex.io exchange
marcorosa
committed

Commits on Jan 6, 2018

Update setup.py
PokestarFan
authored
Add versions
PokestarFan
authored

Commits on Jan 7, 2018

Commits on Feb 25, 2018

Added bid/ask implementation
zchen24
authored

Commits on Feb 26, 2018

Merge pull request #2 from zchen24/patch-1
marcorosa
authored