Add Installation

INSTALLATION.md

@@ -0,0 +1,13 @@
+# Installation
+
+The latest stable version of _taipy_ is available through _pip_:
+```
+pip install taipy
+```
+
+## Development version
+
+You can install the development version of _taipy_ with _pip_ and _git_:
+```
+pip install git+https://git@github.com/Avaiga/taipy
+```