Updated docs

Author: MicheleCeresoli

docs/src/index.md

@@ -0,0 +1,15 @@
+# Welcome to IERSConventions.jl!
+
+_IERS Conventions made easy._
+
+The aim of this package is to provide a set of standardised functions that allow the user to easily handle all the computations related to the IERS, from the earlier 1996 up to the latest 2010 conventions.
+
+
+## Installation 
+
+This package can be installed using Julia's package manager: 
+```julia
+julia> import Pkg
+
+julia> Pkg.add("IERSConventions.jl");
+```