First you need to have QGIS installed (tested with version 2.8 on 64 bit Windows 7) and R Project (tested with version 3.0.3, other might work as well). The preferred way of installing QGIS on Windows is via OSGeo4W advanced installer.

For R you will need a few common extra packages. Start R console and run

install.packages(c('dtw','plyr','ggplot2'))

If these are the only scripts you are using, start by cloning the git repository from Github.

cd ~/.qgis2/processing
git clone https://github.com/mlt/QGIS-Processing-tools.git .

Alternatively download zip file and unpack it there.