Merge pull request #2 from CSNAE/master

Confidence Change
add bittrex
add bittrex
Merge branch 'master' of github.com:project-bitmark/markus
dual call
add market syntax
update documentation
Merge pull request #3 from CSNAE/master

Display time to next retarget
tweak estimated change time and add markets command
mins/hours
mins/hours
there are 60 minutes in an hour not 24 ...
remove additional min
change eta to change
Update bitmark.coffee
Update bitmark.coffee
Merge pull request #5 from CSNAE/patch-3

Update bitmark.coffee
Update bitmark.coffee
Merge pull request #7 from CSNAE/patch-4

toFixed(8)
Add time since last retarget