Minor release:

 - internal time uses ns instead of ms
 - invades pandas plotting backend for df.plot() style coding
 - hopefull pyqtgraph 0.11.1+ compatible
 - RMB+drag box zoom

Deploying new package

 - additional Y-axes
 - fixed bug with e.g. float time series
 - fix bug related to large numbers in log scale
 - fix bug with overlays in odd plots (odd plot color)
 - make renko updates work

Fucked up with git pull/push somehow

Bump to v1.2

Bump pypi

Pipified POC color fix

Only check QT version if possible

In some circumstances QtCore.QT_VERSION is not availble, so don't
require it to be.

Pipify v0.8

Support stock (and not only cryptocurrencies)

Stock exchanges keep closed during e.g. weekends, which used to be drawn
with a gap in the chart. This refactoring fixes that, and I also added
an S&P 500 example.

Bump PyQt to 5.13.0

Seems there was some temporary lapse in their bug; in later versions
it's back.