Added argument filter
Added Doxyfile + some lines of doc.
Added some unary operators
Added composite expression support (work in progress)

* Fix bug duplicated file LazyExpressionTypeTraits.hpp
* More tests in check_operator.hpp and check_argumentFilters.cpp
LazyExpressionPattern is modified to take into account an index
  -> this will allow extended patterns
Added DeduceSize.hpp + tests
Check blas/lapack cleaned
Added new IndexList features
Improved meta-prog error flags
Improvement of LazyExpressionBounds by incorporating an out of bounds fall back, tests are ok
Added ExtendedPattern_Exists in lazyExpressionResultType.hpp file
Important step:
-> Proof of concept of "extended" patterns OK
   (see check_extendedPattern.cpp and check_lazyExpressionResultType.cpp)