Fix and update of pede param plotting macros

[cmsbuild]

• Fix compilation in ROOT6
• Modify default output: one canvas per plot, stored as pdf
• Modify default style
• Add some steering scripts for easy plotting

Automatically ported from CMSSW_7_5_X #9711 (original by @mschrode).

[cmsbuild]

A new Pull Request was created by @cmsbuild for CMSSW_7_6_X.

Fix and update of pede param plotting macros

It involves the following packages:

Alignment/MillePedeAlignmentAlgorithm

@cmsbuild, @mmusich, @diguida, @cerminar can you please review it and eventually sign? Thanks.
@mschrode, @ghellwig, @frmeier, @mmusich, @tlampen this is something you requested to watch as well.
You can sign-off by replying to this message having '+1' in the first line of your reply.
You can reject by replying to this message having '-1' in the first line of your reply.
If you are a L2 or a release manager you can ask for tests by saying 'please test' in the first line of a comment.
@Degano you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[mmusich]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.