Prototype for customizable printing support.

[Gehad Elrobey]

Hello all,

As we are approaching gsoc community bonding period so I thought that a
small prototype may be the best way to discuss my thoughts with the
community.
I sent a group of patches with a very small but full working prototype.

- I added Grantlee library to subsurface code base (thanks for the cmake
build environment it made my life much easier as I don't know qmake at all)
- I create a simple Grantlee template that prints two dives per page.
- the TemplateLayout class iterates the selected dives and interface with
Grantlee backend.
- QWebview and QPainter are used to render the html file living in a
QTemporaryFile object.
- finally I added the "print using templates" option in the print dialog.

Note: I tested this on Linux only, so there may be problems on other
platforms.
also many exceptions still need to be handled this is only a fast prototype
for discussion.

So you may test this and tell me what do you think?

-- 
regards,
Gehad
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