Basic file setup
Basic packages
Use pdflatex instead of xelatex

This requires that the 'stix' package (from www.stixfonts.org) is installed
Useful generic macros
Basic nomenclature used in vertical equilibrium literature
Introduction of the levels
Basic equations
Derivation of rel.perm. expressions
Capillary pressure
Define velocity using lateral operator too
Reference point for brine pressure set to same as for CO2
Generalize pressure for both phases into one equation
Use Latin Modern fonts instead of Stix

Stix fonts are not yet commonly available in TeXLive distributions and
thus require manual installation, whereas Latin Modern is available out
of the box.
Provide instructions on how to generate document

The build system has not yet learnt how to build random LaTeX-
documents; this document describes how to do it.
Add reference to paper which documents model
Findopm-parser.cmake: make sure that the ERT libraries are available

and some other minor cleanups to the module. For me it still works,
but this being the build system, I can't guarantee more...
Findopm-parser.cmake: invoke FindBoost unconditionally

even if boost was found previously, it might still miss a few
libraries. thanks to @akva2 for catching this.
Disable search for Boost in parser detection

This changeset disables the effect of commit 1be7a85.  There appears
to be an unforeseen interaction between the calls to

    Find_Package (Boost)

that are implied by module 'opm-parser-prereqs.cmake' and the one
that's directly invoked in 'Findopm-parser.cmake'.  Until the
situation can be fully analysed and a complete solution implemented,
this is a temporary measure to restore the build of opm-core and
downstream OPM modules.
added: hook for conditionally compiled files

backport from opm-upscaling PR#100
Merge pull request #67 from bska/067_cmake

Synchronise build system with OPM-Core