Merge branch 'prefaces'

Merge pull request #978 from brotherben/master

Update information about paid GitHub plans

Add pointer to German translation

Add index to pdf ebook

Merge pull request #969 from progit/rework_files

Rework files

Merge pull request #970 from uerdogan/issue-963

Update remote-branches.asc: Resolves #963

Merge pull request #968 from severinolorillajr/patch-2

Added Tagalog Links

Add polish translation

Merge pull request #961 from td2014/master

Minor typo corrections.

Stahp updating bundler