Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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diff --git a/src/3rdparty/2geom/HACKING.md b/src/3rdparty/2geom/HACKING.md
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+# Mailing list
+Communication about this project occurs on the lib2geom
+[mailing list](https://lists.sourceforge.net/lists/listinfo/lib2geom-devel).
+
+
+# Help Wanted
+We greatly appreciate contributions.  You don't need to be a `math-whiz` or
+`über-hacker` (though these are definitely appreciated :) ) to help.  The tasks
+of code cleanup, consistency, testing, documentation, and toys mostly just
+require perseverance, and benefit the project greatly.
+
+As far as very specialized skill, we are always in need of mathy people, even if
+it is just for their insight on problems and techniques (as opposed to coding).
+
+# Coding Style
+Please refer to the
+[Coding Style Guidelines](http://www.inkscape.org/doc/coding_style.php)
+if you have specific questions on the style to use for code. If reading style
+guidelines doesn't interest you, just follow the general style of the
+surrounding code, so that it is at least internally consistent.
+
+# Compiling
+For Windows instructions, see [README.win32.md](README.win32.md)
+
+For Debian-like platforms, the following packages are required:
+ - cairo v1.1.7 or later (Debian package libcairo2-dev)
+ - cmake
+ - make
+ - libboost-dev
+ - libgsl0-dev (though eventually it will only be required in tests)
+ - refblas3* on dapper
+
+To compile, use
+```bash
+cmake .
+Make
+```
+
+If you have problems, just ask on the mailing list.
+
+# Running tests
+For Debian-like platforms, after compiling lib2geom, issue this command line
+```bash
+make test
+```
+
+# Adding a unit test
+Make sure you write it using GTest syntax - look at e.g.
+[src/tests/affine-test.cpp](src/tests/affine-test.cpp).
+
+To add the test to the build, add the test to
+[src/tests/CMakeLists.txt](src/tests/CMakeLists.txt) in under
+`SET(2GEOM_GTESTS_SRC)`.