Fix unnecessary rules for FORTRAN types
Fix highlighting issues

- Fixed highlighting defined type in variable declarations
- Corrected parser state following docBlock closure
Fix FORTRAN code function scope test
Fix description of USE_PDFLATEX

The tag is USE_PDFLATEX, not LATEX_PDFLATEX
Added documentation for some missing HTML commands

Added documentation for H4, H5 and H6 command to be complete and extended IMG description a bit
Bug 730888 - [PATCH] Fix missing '&' in Boolean operation in qstring.cpp
Merge pull request #177 from albert-github/feature/missing_html

Added documentation for some missing HTML commands
Merge pull request #176 from jwakely/patch-1

Fix description of USE_PDFLATEX
Merge pull request #172 from hansec/fortran_typdef

Fix unnecessary rules for FORTRAN user defined types
Merge branch 'master' of github.com:doxygen/doxygen
Fix warning about unused functions in qstring.cpp