[doc] add tutorial to install Sakia dev on Fedora.

doc/install_for_developpers.md

+# Install Sakia for developpers
+### Windows install
+
+ * Download and install [vcredist2015](https://www.microsoft.com/fr-FR/download/details.aspx?id=48145)
+ * Download and install [Miniconda](http://conda.pydata.org/miniconda.html).
+ * Download and install [Git](https://git-scm.com/) and add the binaries path to your `PATH` variable
+ * Download and install [Qt 5.6](http://download.qt.io/development_releases/qt/5.6/) for your architecture (msvc2015_64 for 64 bits, msvc2015 for 32 bits)
+ * Open Conda console then : `conda update --yes conda`
+ * Restart Conda console then : 
+
+```
+conda config --add channels inso/channel/sakia
+conda create -n sakia-env python=3.5 pyqt5 libsodium=1.0.3
+activate sakia-env
+pip install -r requirements.txt
+pip install pyinstaller
+```
+ * To run sakia, you have to export the following variable in your conda console : 
+
+```
+SET PYTHONPATH=[Path to sakia dir]\\src;%PYTHONPATH%
+```
+
+ * Then : 
+```batch
+python gen_resources.py 
+python gen_translations.py
+python src/sakia/main.py
+```
+
+### Linux & Macos (Pyenv install)
+#### Linux System dependencies
+##### Fedora
+    sudo dnf install libsodium qt5-qtsvg python3-qt5 qt5-qttools \
+    qt5-qttools-devel python3-qt5-devel qtchooser openssl-devel zfstream-devel \
+    readline-devel sqlite-devel gcc-c++ \
+    qt5-qtbase-devel qt5-qtsvg-devel
+
+    sudo ln -s /usr/bin/lrelease-qt5 /usr/bin/lrelease
+
+##### Ubuntu 14.04+ install
+
+    sudo apt-get install curl qt5-qmake qtbase5-dev qttools5-dev-tools libqt5svg5-dev libdbus-1-dev libdbus-glib-1-dev autoconf automake libtool
+
+64 bits:
+
+      wget http://archive.ubuntu.com/ubuntu/pool/universe/libs/libsodium/libsodium13_1.0.1-1_amd64.deb
+      sudo dpkg -i libsodium13_1.0.1-1_amd64.deb
+
+32 bits:
+
+     wget http://archive.ubuntu.com/ubuntu/pool/universe/libs/libsodium/libsodium13_1.0.1-1_i386.deb
+     sudo dpkg -i libsodium13_1.0.1-1_i386.deb
+
+##### Install pyenv on your home:
+
+* Linux : 
+```bash
+curl -L https://raw.githubusercontent.com/yyuu/pyenv-installer/master/bin/pyenv-installer | bash
+```
+
+Add in `~/.bash_profile`, in `~/.bashrc` on Fedora:
+```bash
+export PATH="$HOME/.pyenv/bin:$PATH"
+eval "$(pyenv virtualenv-init -)"
+eval "$(pyenv init -)"
+export PYENV_ROOT="$HOME/.pyenv"
+```
+Restart your terminal.
+
+
+#### MacOS system dependencies
+
+Install the following brew packages : 
+```bash
+brew install wget
+brew install libsodium
+## Ensure your brew QT version is up to date. (brew install qt -> qt 4.8)
+brew install qt5
+brew link --force qt5
+## Install pyenv
+brew install pyenv
+brew install pyenv-virtualenv
+```
+
+After installation, you'll need to add :  
+```bash
+eval "$(pyenv init -)"
+eval "$(pyenv virtualenv-init -)"
+```
+to your profile (as stated in the caveats displayed by Homebrew — to display them again, use brew info pyenv). You only need to add that to your profile once.
+
+If you are running El Capitan (MacOS 10.10), you'll need to run `xcode-select --install`
+
+#### Pyenv environment 
+
+##### Build python 3.5.0
+Restart your shell then prepare your virtualenv: 
+
+On GNU/Linux: `PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install 3.5.1`  
+On MacOS: `env PYTHON_CONFIGURE_OPTS="--enable-framework" pyenv install 3.5.1`
+
+Run:
+```bash
+pyenv shell 3.5.1
+pyenv virtualenv sakia-env
+```
+
+#### Build Sakia: 
+
+##### Download Sakia
+
+    git clone https://github.com/duniter/sakia
+
+##### Go to dev branch
+```bash
+cd sakia && git checkout dev
+```
+
+##### Configure your PYTHONPATH environment variable
+```bash
+export PYTHONPATH=${PYTHONPATH}:/YOUR_SAKIA_INSTALL_PATH/src
+```
+
+On Linux, you'll need buildable python-dbus and notify2 :  
+```bash
+pyenv activate sakia-env
+pip install PyQt5
+rm ~/.pyenv/versions/sakia-env/bin/pyuic5 # Because of some bug in binary packages we need to remove this
+pip install -U git+https://github.com/posborne/dbus-python.git
+pip install notify2
+```
+
+To build sakia dependencies, go in sakia directory then : 
+```bash
+pip install -r requirements.txt --upgrade
+pip install pyinstaller
+pyenv rehash
+```
+
+##### Run Sakia ressources generator
+
+    python gen_resources.py 
+
+##### Run Sakia translations generator
+
+    python gen_translations.py
+
+##### Build Sakia as a binary
+```sh
+pyinstaller sakia.spec
+```
+
+##### Run Sakia build
+```sh
+./dist/sakia/sakia
+```
+
+##### Run Sakia from sources
+
+    cd src && python sakia/main.py
+
+
+#### Tips
+You could find cache repositories on Unix at `~/.conf/sakia` and on Windows at `%APPDATA%\sakia`.
+