v0.6.0rc1

Release Notes

Adding one feature that will make my thesis work easier, outputting the residual timeseries after beta series estimation. This release also contains changes to update links to the "new" default travis ci .com and makes sure I'm using sphinx 2.x.x, and not the new 3.x.x.

CHANGES

• [ENH] add --return-residuals (#304) @jdkent
• [MAINT] update travis badge and pin sphinx (#305) @jdkent