Convert FORTRAN modules to namespaces

This helps fix linking issues and ambiguity related to the difference between classes and modules in FORTRAN 2003+.
Limit images sizes and make more uniform (LaTeX)

This patch adjusts some problems regarding image sizes in LaTeX output of doxygen (a.o. Bug 738299 - When using msc or PlantUML, the default latex for the created image should include [width=\linewidth]) this has been done is such a way that all the "image" commands (i.e. image, dot, dotfile, msc, mscfile, diafile, startuml) operate in a similar way / have the same possibilities.

- commands.doc
Adjusted documentation to reflect changes.

- cmdmapper.cpp
- cmdmapper.h
Added utility function to map command id back to command name

- doctokenizer.h
- doctokenizer.l
Handle Caption  and Size indication. Required also that some other rules had to be tightened a bit (like usage of {} in startuml and usage of "" for captions. This was already described in the documentation in this way).

- docparser.cpp
- docparser.h
Created routine to uniformly handle the Caption and size indications and store them in a general way.

- latexgen.cpp
Replaced graphicx package by adjustbox package (includes graphicx) to support "min width" etc.

- doxygen.sty templates\latex
Added commands to make commands with and without caption behave similar.

- docbookvisitor.cpp
- docbookvisitor.h
- htmldocvisitor.cpp
- latexdocvisitor.cpp
- latexdocvisitor.h
- printdocvisitor.h
- xmldocvisitor.cpp
Created routine to uniformly handle the Caption and size indications in a general way.

- indexpage.xml (testing\022)
- indexpage.xml (testing\031)
- class_receiver.xml (testing\037)
- class_sender.xml (testing\037)
Adjusted example output.
Fix rules for closing FORTRAN module and typedef scopes
Remove filtering rule when generating FORTRAN module links
Add source code possibility for RTF output

Analogous to Latex and HTML output the possibility to have source code shown in RTF output is created.
Based on question: http://doxygen.10944.n7.nabble.com/RTF-lack-of-source-code-tc6936.html
Bug 741417 - Crash when building gtkmm documentation
Merge branch 'master' of github.com:doxygen/doxygen
Update README.md
Bug 740218 - Full scope needed when making link inside cross-referenced section (fixed regression)
Fixed issue parsing @end directly followed by the end of the file
Bug 704090 - Allow Class{T}.Method in cref to refer to a generic class in XML comments
Bug 735584 - Reached end of file while still insided a (nested) comment in Markdown
Bug 738167 - Entity references in XML command attributes are incorrectly handled
Merge pull request #247 from hansec/FORTRAN_moduleNS

Convert FORTRAN modules to namespaces
Merge pull request #264 from albert-github/feature/bug_rtf_source

Add source code possibility for RTF output
Merge branch 'feature/bug_size_latex' of https://github.com/albert-github/doxygen into albert-github-feature/bug_size_latex

Conflicts:
	src/doctokenizer.h
	src/latexgen.cpp
Supporting linking for methods bound to FORTRAN classes in source definitions
Merge pull request #268 from hansec/FORTRAN_link_bound_methods

Supporting linking for methods bound to FORTRAN classes in source definitions
various fixes and restructuring
Merge branch 'master' of github.com:doxygen/doxygen