sqlite3: clear bindings on errors and more care with return

* call sqlite3_clear_bindings when step fails
* more miss-placed returns
Signed-off-by: Adrian Negreanu <adrian.m.negreanu@intel.com>

add search.py, a client for doxygen_sqlite3.db

sqlite3: tweaks for performance

Signed-off-by: Adrian Negreanu <adrian.m.negreanu@intel.com>

these were causing a major performance hit
Signed-off-by: Adrian Negreanu <adrian.m.negreanu@intel.com>

the code comes from the early stage of sqlite3gen, when xref keys were
kept as "file:line:column", not as function name.
Signed-off-by: Adrian Negreanu <adrian.m.negreanu@intel.com>

sqlite3: use the new qtools API

Signed-off-by: Adrian Negreanu <adrian.m.negreanu@intel.com>

Bug 683115 - Command ignored when using umlauts in markdown and also C-comments in markdown didn't work properly

Bug 721618 - Move contructors and move assignment operators of embedded classes of template classes cannot be matched.

Bug 626172 - Latex $projectname with "&" gets no escaped

The variable elements in the header en footer should be converted to latex string, now they are in the format as defined in the Doxyfile

Bug 721302 - [Latex/PDF] Merging brief and detailed description in file section

add css-escape to avoid jquery based xss

Bug 436885 - c-source and h-source missing for latex

Not only for Man pages the extra returns are necessary but also for LaTeX output.
The change in filedef.cpp is a direct consequence of t the bug report.
The groupdef.cpp has been tested on propriety code and the namespacedef.cpp and dirdef.cpp directly follow from code similarity.

Original title does not cover problem anymore. Problem has evolved to that when clicking on the name for the source file (in LaTeX) a jump to the beginning of the document was made. This problem is fixed with this patch.

- operations on current index and node (next(), prev(), last(), first()) have been removed.
- access to internal nodes has been removed.
- old QList has been renamed to QInternalList for use inside qtools only.
- added type safe compare, new, and delete operations (compareValues(), newValue(), deleteValue()).
- add compareValues also to QDict for consistency.
- changed doxygen's implementation to comply with the new QList and QDict interface.

\xmlonly aoppeared twice in see also section of \htmlonly and \docbookon...