Update to clang-format-5 and reformat the codebase 

...and other generic cleanup of MatrixWorkspace to reduce its
dependence on blocksize()

Now Histograms are automatically created with right mode based on X and
Y length, so this is no longer necessary (actually it even made some
tests fail).

The converted text is stored in separate .rst files in the docs directory.
Refs #9562

Refs #3984 Took the wiki description from every algorithm's wiki page and placed it in a comment in the CPP file (instead of the header file).

Refs #2572: Added an initDocs() for all algorithms that sets the summary string to display in the dialog, as well as the wiki summary for possible later auto-wiki-fication of documentation.

Rename Framework code directory to just that. Also delete Main and VS & Eclipse project file. Re #1881.