Merge pull request #4 from mhanne/examples

Examples for ElmButton, ElmList, ElmGenList
tools/install-efl.sh: use current version is 1.7.5
Merge branch 'master' of github.com:jeremyz/ffi-efl
tools/install-efl.sh: build ecore before eio and make curl follow redirects
example for ElmPanes (also fixes the class name in elm_panes.rb)
example for ElmPanel
example for ElmNaviFrame
example for ElmLayout
examples for Ecore pipe. Thanks to jeremyz for the original -native version!