Add some basic debug logging to show what the build is doing
Add some basic debug logging to show what the build is doing

This can be used with `mkdocs build --verbose`. It doesn't add a ton of
output, but if we get an error it will give us an idea on what page it
happens.

pjbull/mkdocs,hhg2288/mkdocs,rickpeters/mkdocs,gregelin/mkdocs,tedmiston/mkdocs,mlzummo/mkdocs,jamesbeebop/mkdocs,jamesbeebop/mkdocs,d0ugal/mkdocs,pjbull/mkdocs,justinkinney/mkdocs,pjbull/mkdocs,cnbin/mkdocs,peter1000/mkdocs,gregelin/mkdocs,davidgillies/mkdocs,williamjmorenor/mkdocs,jimporter/mkdocs,williamjmorenor/mkdocs,xeechou/mkblogs,jimporter/mkdocs,mkdocs/mkdocs,fujita-shintaro/mkdocs,peter1000/mkdocs,lbenet/mkdocs,gregelin/mkdocs,ramramps/mkdocs,waylan/mkdocs,jeoygin/mkdocs,michaelmcandrew/mkdocs,ramramps/mkdocs,lukfor/mkdocs,kubikusrubikus/mkdocs,lukfor/mkdocs,vi4m/mkdocs,kubikusrubikus/mkdocs,waylan/mkdocs,mlzummo/mkdocs,tedmiston/mkdocs,samhatfield/mkdocs,simonfork/mkdocs,d0ugal/mkdocs,xeechou/mkblogs,davidgillies/mkdocs,ramramps/mkdocs,nicoddemus/mkdocs,longjl/mkdocs,samhatfield/mkdocs,michaelmcandrew/mkdocs,dmehra/mkdocs,lbenet/mkdocs,cnbin/mkdocs,mkdocs/mkdocs,samuelcolvin/mkdocs,nicoddemus/mkdocs,simonfork/mkdocs,longjl/mkdocs,samuelcolvin/mkdocs,lukfor/mkdocs,fujita-shintaro/mkdocs,jeoygin/mkdocs,fujita-shintaro/mkdocs,waylan/mkdocs,cnbin/mkdocs,samhatfield/mkdocs,rickpeters/mkdocs,xeechou/mkblogs,xeechou/mkblogs,jimporter/mkdocs,davidgillies/mkdocs,justinkinney/mkdocs,rickpeters/mkdocs,lbenet/mkdocs,nicoddemus/mkdocs,simonfork/mkdocs,vi4m/mkdocs,michaelmcandrew/mkdocs,vi4m/mkdocs,dmehra/mkdocs,jeoygin/mkdocs,kubikusrubikus/mkdocs,hhg2288/mkdocs,samuelcolvin/mkdocs,d0ugal/mkdocs,dmehra/mkdocs,williamjmorenor/mkdocs,justinkinney/mkdocs,mlzummo/mkdocs,mkdocs/mkdocs,peter1000/mkdocs,tedmiston/mkdocs,hhg2288/mkdocs,longjl/mkdocs,jamesbeebop/mkdocs