Added make.bat file for building docs on Windows
Added make.bat file for building docs on Windows

This is usually created automatically by sphinx-quickstart, but seems
to be missing in skimage. It caused a number of problems for Windows
users during the EuroSciPy 2015 sprints.

pratapvardhan/scikit-image,Hiyorimi/scikit-image,ofgulban/scikit-image,ofgulban/scikit-image,ajaybhat/scikit-image,jwiggins/scikit-image,WarrenWeckesser/scikits-image,paalge/scikit-image,blink1073/scikit-image,chriscrosscutler/scikit-image,paalge/scikit-image,pratapvardhan/scikit-image,jwiggins/scikit-image,ClinicalGraphics/scikit-image,keflavich/scikit-image,blink1073/scikit-image,ajaybhat/scikit-image,WarrenWeckesser/scikits-image,Midafi/scikit-image,Hiyorimi/scikit-image,vighneshbirodkar/scikit-image,paalge/scikit-image,ofgulban/scikit-image,vighneshbirodkar/scikit-image,emon10005/scikit-image,rjeli/scikit-image,rjeli/scikit-image,rjeli/scikit-image,youprofit/scikit-image,chriscrosscutler/scikit-image,emon10005/scikit-image,Midafi/scikit-image,keflavich/scikit-image,ClinicalGraphics/scikit-image,vighneshbirodkar/scikit-image,youprofit/scikit-image