Avoid leading space in package name

By having an M4 line comment ("dnl") at the end of the line after the
comma, it seems that the indentation is included in the string on the
next line (it does not start at the escaping bracket).

This whitespace should be removed so the PACKAGE define can be used in
for instance filenames.
Provide pkgconfig files for library

A boilerplate .pc file is provided in the lib/pkgconfig directory. Using
this location has the advantage of being in the same path relative to
the libraries as it will be in the installation. The drawback is that the
lib/ directory no longer contains just output unless one uses out-of-tree
builds.

In the root directory of the project a local .pc file is provided which
instead of the usual end-installation directory rather points to the
build and source directories. By adding the build directory to the
PKG_CONFIG_PATH environment variable, a local build can be referred to
from other projects (such as examples or specific test-cases).

Having two different files is unfortunately necessary since pkgconfig
does not support prefix rewriting on Linux, and having them in two
different directories is necessary since the AutoMake-generated files
is not capable of renaming a file, only relocating it.
Merge pull request #31 from rolk/local-pkgconf

Support for pkg-config
Make LT_INIT recognizable by autoconf

The LT_INIT macro is wrapped in an m4_ifdef to handle older versions of
libtool. However, the text scanning done by libtoolize cause a warning
if this statement does not match a particular search expression.

Writing the clause in this form makes the (false) warning go away.
Disable warning for using DUNE's FieldVector::size

In DUNE 2.2 FieldVector::size changed from being a member to being a
method. A compatibility warning is issued if you include the relevant
headers.

This warning can be silenced for DUNE modules by using passing the
option --enable-fieldvector-size-is-method to ./configure. This patch
effectively does the same, but through a macro definition.
Merge pull request #33 from rolk/fieldvec

Disable warning for using DUNE's FieldVector::size
Merge pull request #32 from rolk/lt_init

Silence faulty warning from libtoolize about LT_INIT
Fix comment and indentation.
Add new saturation function class SatFuncGwseg.

Based on a model where gas and water is segregated,
and oil equally present in both gas and oil zones.
Add support for new three-phase relperm option to BlackoilPropertiesFromDeck.

New parameter option added: 'threephase_model' can now be 'gwseg'.
Guard against input error.

If no valid threephase_model is input, throw instead of crashing.
Merge pull request #34 from atgeirr/new_threephase_relperm

Thanks for the clarifications.
Add tentative implementation of surface-rate targets.

Not tested at present.
Merge pull request #35 from bska/implement-surface-rate

Add Tentative Implementation of Surface-Rate Targets
Unauthenticated packages fails with -y option and repo update needed.
Oops, line moved to correct location.
Merge pull request #36 from alfbr/master

Improve the README for ubuntu installation.
Added perfPress() to WellState.
Update WellState::perfPress() after pressure solve.
Modified functions dealing with transport source.

In preparation for switching to new convention for inflow
sources in the compressible case: source being surface volumes,
not reservoir volumes.