Using a statically linked dune-uggrid together with the Python bindings
leads to hard-to-diagnose crashes and other bugs.  This patch therefore
enables shared libraries, and adds a lengthy explanation of why
this is necessary.

Add max buffer size to printf functions

See merge request !241

Unbounded buffers triggers warnings in Apple clang

Write a README.md file

See merge request !240

To help people understand what this module is about.

Mark various pointers const

See merge request !239

Found by Cppcheck (constVariablePointer)

Fixes Cppcheck warnings constVariablePointer

Found by clang-tidy (readability-non-const-parameter)

Found by Cppcheck (constParameterPointer).

Improve refine.cc

See merge request !238

Add braces to help human readers

Move many declarations into for loops.

Found by Cppcheck (constVariablePointer, constParameterPointer).

Replace C array by C++ std::array where possible

See merge request !237

Without a performance penalty, std::array knows its
size and offers a more modern and less error-prone
interface.
Found by clang-tidy (modernize-avoid-c-arrays).

Reduce scope of variables, make pointer vars const

See merge request !236

Move variables into for loops.
Move variable declaration closer to first use.

Fix mulitple Cppcheck warnings (constVariablePointer).

Mainly moving variable declarations into for loops.
Fix a warning found by Cppcheck (variableScope).

Some fixups in refine.cc

See merge request !235

Remove unreachable code, reduce some variable's scope

See merge request !234

Move variable to make them more local.
Fox on more Cppcheck warning (variableScope).

Found by Cppcheck (unreadVariable).

Fix two Cppcheck warnings (constVariablePointer)

Make variables more local, especially move them into for loops.
Fixes four Cppcheck warnings (variableScope, redundantAssignment,
shadowVariable).

Two instances found by Cppcheck (variableScope).
Reduced variable scope and put together variable declaration
and initialization in surrounding code.

Found by Cppcheck (unreachableCode).

Remove code deprecated in 2.9 or earlier

See merge request !233

.. and its flags `FROM_BOTTOM` and `FROM_TOP`.