Add helpers grad, fullngrad, fulldiv.
Let sim_2p_comp_ad throw if not given an input deck.

There is some code in place now to create wells for the no-deck case,
but since it does not work correctly yet, the simulator intercepts this
and throws.
 Add special variable for MultiArch-unaware components

Some components are not yet MultiArch-aware and installs to either
lib/ (Debian) or lib64/ (RHEL) on 64-bit platforms. If we need to
interface with these components, then it is nice to have such a
variable set together with the regular detection code.
 Use MultiArch-unaware path for dune.module

As of 2013-09 the DUNE code that reads dune.module is not MultiArch-
aware. Thus, for a 64-bit platform it will look in lib/ on Debian and
lib64/ on RHEL.
The porevolume was multiplied twice in computeAccum for the gas phase dissolved in the oil
Remove unnecessary include statement.
Rename AutoDiff::Forward -> Opm::AutoDiff.
Rename AutoDiff::ForwardBlock -> Opm::AutoDiffBlock.

Also moved AutoDiffHelpers.hpp content to Opm namespace, and modified other
files as required by these two changes.
Documented AutoDiffBlock.
Documentation refinement. Added main doc file.
Renamed misleading adfi -> fi.

Some classes and a program were renamed since they were not fully implicit
solvers despite their names indicating it.
Merge pull request #31 from totto82/buildstuff

Added changes from PR #373 in opm-core to opm-autodiff
Merge pull request #33 from totto82/bugfixes

Bugfix
Compute gravity potensial using the face average as in Eclipse and Mrst
Added an option to write well reports to a .mat file
Document class BlackoilPropsAd.
Require deck and remove simple source term in fully implicit sim.
Documented BlackoilPropsAdFromDeck.
Documented class DerivedGeology.
Documented class FullyImplicitBlackoilSolver.