doc and install

README.md

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+Optifik version 0.1.0
+
+
+# Installation
+
+The use of pip must be limited to virtualenv
+
+
+* From PyPI
+```
+pip install optifik
+```
+
+* From tarball
+```
+pip install /chemin/vers/optifik-0.1.0.tar.gz
+```
+
+* From the source code
+```
+pip install .
+```
+
+
+# For contributors
+
+* Install an editable version
+```
+pip install -e .
+```
+
+* Install dev tools
+```
+pip install -e ".[dev]"
+```
+
+* Install doc tools
+```
+pip install -e ".[docs]"
+```
+
+* Build the doc
+```
+cd docs
+make html
+```
+