Made INSTALL file version and date independent

Bug 172072 - $title doesn't work in LateX header

Corrected copyright year

In case $title is used in the latex header or footer it is now replaced with the empty string (it was left inside, resulting in non translatable LaTeX code), the documentation has been updated too.

See also:
Bug 668004 - LATEX_HEADER should share common information with HTML_HEADER
Bug 401327 - LATEX_HEADER: $title does not get expanded

Consistency of usage of the word LaTeX in the documentation

Fix segfault on invalid bounding FIG when patching dot

Inconsistency in usage of simplesecr versus simplesectsep corrected

The word LaTeX was used as just the word and on other places as \f$\mbox{\LaTeX}\f$
This has been made more consistent by means of the definition of the Alia \LaTeX (similar for \TeX)
Some names of executables etc. were not set in a 'code' font.

Conflicts:
	src/doctokenizer.l

Fix id parsing for atx markdown headers

Merge branch 'feature/bug_678436' of https://github.com/albert-github/doxygen into albert-github-feature/bug_678436

Blank spaces after an if statement have to be removed as well. Also spaces before the firs round bracket have to be removed.

Blank spaces after an if statement have to be removed as well. Just enable them as part of the parameter of the conditional expression and remove them later on (to be safe not having them in the parser).