speedup (#59)

* remove unused functions

* cythonize common

* add bds05

* separate cleanly cython and python, bds05, bds06, modulo issues

* bds08

* bds09

* optimisations in bds09

* "make" things easier

* clean up useless stuff

* add make options

* fix hidden altitude() call

* minor updates to C code

* update tests

* update benchmark

* consolidation

* update clean script

* reduce complexity and change default type to str

Co-authored-by: Xavier Olive <1360812+xoolive@users.noreply.github.com>

README.rst

@@ -321,8 +321,19 @@ Here is an example:
 
 Unit test
 ---------
-To perform unit tests. First, install ``tox`` through pip. Then, run the following commands:
+To perform unit tests, ``pytest`` must be install first.
 
-.. code:: bash
+Build Cython extensions
+::
 
-  $ tox
+  $ make ext
+
+Run unit tests
+::
+
+  $ make test
+
+Clean build files
+::
+
+  $ make clean