Fixes and improvements to transport solver docs.
Moved MonotCubicInterpolator to Opm namespace.

Also minor doc fix.
Moved the VAG code to namespace Opm.
Merge pull request #217 from atgeirr/install-programs

Add programs to be installed.
Merge remote-tracking branch 'upstream/release/2013.03' into doc-fixes
Fix tinyxml exclusion.
Fix exclusion of TinyXML from doc generation.
Fix docs for IncompPropertiesBasic.
Fix minor doc errors.
More minor doc fixes.
Change doxygen syntax to use markdown.
Use markdown for parameter lists.
Use markup for parameter lists.
Merge pull request #218 from atgeirr/doc-fixes

Doc fixes for opm-core
Include config.h in cpp file.
Make all codes use the same linear interpolation routines.
Finished unification of linear interpolation.

The functions of linInt.hpp are now used everywhere, but:
 - linInt.hpp -> linearInterpolation.hpp (better name)
 - linearInterpolationExtrap() -> linearInterpolation() (extrapolate by default)
Remove linInt.hpp from header list.
Simplified class NonuniformTableLinear.

Removed the policy control for what to do beyond the domain.
Old behaviour was constant extrapolation, current behaviour
is linear extrapolation. The possibility to choose was never
needed and has beem removed.
Added test for class NonuniformTableLinear.

Formerly lived in opm-porsol.