Add some compilation flags for g++ depending on gcc version
Fix warning about mtemp use
Merge branch 'develop' of github.com:feelpp/feelpp into develop
Add specific options for g++ >= 4.9
Merge branch 'develop' of github.com:feelpp/feelpp into develop
Merge branch 'develop' of github.com:feelpp/feelpp into develop
Merge branch 'develop' of github.com:feelpp/feelpp into develop
Merge branch 'develop' of github.com:feelpp/feelpp into develop
Merge branch 'develop' of github.com:feelpp/feelpp into develop
work on #301: define product of space easily
cleanup doc,see #300
re-organize the document and try to make it more coherent, see #300
rework the tutorial and make it a step-by-step tutorial, see #300
Merge branch 'feature/productspaces' into feature/doc
improve integrals tutorial, see #300
allow printing expressions using c++ i/o  streams
Some minor changes to compiler
Merge branch 'develop' of github.com:feelpp/feelpp into develop
CRB: Updated OpenCL implementation
fix compilation of traces.cpp