Update README.md

README.md

+This repository contains multiple projects related to float-to-fix converstion.
+The following is about typeexploration.* projects, initially written by Antoine Morvan.
 
+Building Gecos F2F-dev - 2019-01
+=====================
+
+Objective : build Gecos float2fix source from sources in Eclipse and run it
+
+## Requirements
+
+Make sure to have Java 8+ and Maven 3.5.0+ installed on your system.
+
+## Download Required Projects
+
+From https://gitlab.inria.fr/gecos, clone following repositories:
+* gecos-builtools
+* gecos-core
+* gecos-float2fix
+* gecos-framework
+* gecos-testframework
+* under GeCoS Tools:
+    * gecos-tools-emf
+    * gecos-tools-graph
+    * gecos-tools-tommapping
+    * gecos-tools-tomsdk
+
+![](https://i.imgur.com/qAIcxVx.png)
+
+## Install Parent Project in Local M2 repo
+
+In order to prevent errors in later Maven resolving steps when building with Eclipse, it is necessary to first install the **gecos-buildtools** project in the local Maven repository. To do so, open a terminal in the **gecos-buildtools** and run **mvn clean install**
+
+```
+$ cd ~/git/gecos-buildtools/
+$ mvn clean install
+```
+
+## Setup Eclipse and required Plugins
+
+In order to build Gecos F2F in Eclipse, you need a set of extra plugins to support Xtext and Xtend.
+1. Downlad Eclipse Modeling Tools from packages list at https://www.eclipse.org/downloads/packages/release/2018-12/r/eclipse-modeling-tools
+2. Run Eclipse and select an empty workspace
+3. Help / Install New Software...
+4. Select repository "2018-12 - http://download.eclipse.org/releases/2018-12"
+5. Select the following features
+    * Programming Languages / C/C++ Development Tools SDK
+    * Modeling / Eclipse Modeling Framework Xcore SDK
+    * Modeling / MWE 2 runtime SDK
+    * Modeling / MWE 2 language SDK
+6. Click on Next then follow procedure then restart Eclipse when asked
+
+## Import Projects and Build
+
+After Eclipse restart, import and build projects:
+1. File / Import ...
+2. General / Existing Projects into Workspace
+3. Select root directory / select the git folder where all the git repositories are
+4. Make sur the box "Search for nested projects" is ticked
+5. In the list of projects, unselect the following projects:
+    * gecos-buildtools
+    * gecos.ci.jenkins.api
+    * test_basenlm
+6. Click on Finish and wait for the build process to terminate
+7. Some error should appear because of missing resources. Simply create the folders on the projects:
+    * fr.irisa.cairn.gecos.testframework.resources/src
+    * fr.irisa.cairn.gecos.model/xtend-gen
+    * fr.irisa.cairn.eclipse.tom/src
+8. If some errors are still present, click on Project / Clean ... and clean all projets.
+
+## Run Gecos F2F
+
+1. The exploration tool is invoked by Compiler Script commands
+2. Command TypesExploration takes a GecosProject and a path to property file
+3. Run TypesExploration(".") to generate a default property file
+4. See 'fr.irisa.cairn.gecos.typeexploration.demo/demos/conv/' for an example