Windows installation guide

Downloading via file_get_contents & creation of BAT file
Add sub-headlines to Repositories chapter
Troubleshooting ... some lessons learnt
Add troubleshooting URL to error message
Add support for alternative structures
Re-wrap and re-format some docs to make the LaTeX friendly
Add script to produce a PDF version of the docs
Made repoConfig available for the VcsDriver to be able to provide additional configuration options easily.
in VersionParser only truncate the version if hash
removed unneccesary PackageMock and trailing whitespaces
simplified if statement
Update name to "The Composer Community"

(so I don't get blamed for breaking it)
Smaller page margins that are same on all sides
Increase margin by 0.5in
Wrap listings in minipage to prevent page breaks
Vertically justify text to the top of the page
Fixed tests
removed overkill function isHash as suggested by @stloyd
added --prefer-dist option
compare references when using dists