Calibration move detailed documentation to python pages (Easy to test)

[Gesner Passos]

There are some wiki documentation available for the Calibration there are not more easily accessible:

TubeSpec, Tube_calib, IdealTube, TubeCalibFitParams.

The information found there would be better if placed inside the code documentation found at ​http://download.mantidproject.org/docs/master/python/html/techiniques/calibration.html

Work on this.

[Gesner Passos]

Provide access to the implementation details for Calibration

Extends the documentation to parse the code inside the methods that implements the calibration and the objects related to it.

re #7496

Changeset: 99b9195b02b93930432d7f39ce326932154a5711

[Gesner Passos]

Tester:

the previous pages that were enable in our wiki were:

• http://www.mantidproject.org/TubeSpec
• http://www.mantidproject.org/Tube_calib
• http://www.mantidproject.org/IdealTube
• http://www.mantidproject.org/TubeCalibFitParams

The information found there (if still valid) must be available inside the python docs, and hopefully improved. Now, you can see only inside the develop branch - ​http://download.mantidproject.org/docs/develop/python/html/techiniques/calibration_implementation.html, but if you pass this ticket, it will be available on the master link.

[Jay Rainey]

Documentation has been improved, and relevant Calibration descriptions are now more accessible.

[Jay Rainey]

Merge remote-tracking branch 'origin/feature/7496_detailed_doc_calib'

[Stuart Campbell]

This ticket has been transferred to github issue ​8341