Update synopsis and file description.
Clean up well docs.

Needed to rename structs in legacy_well.h to avoid clash in docs.
Minor doc fix.
Completed main doc page for opm-core.
Fixes and improvements to time-of-flight solver docs.
Fixes and improvements to transport solver docs.
Moved MonotCubicInterpolator to Opm namespace.

Also minor doc fix.
Moved the VAG code to namespace Opm.
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