Add terraform slides

Signed-off-by: Arnaud Morin <arnaud.morin@ovhcloud.com>

terraform/slides/lib/font/league-gothic/LICENSE

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+SIL Open Font License (OFL)
+http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL

terraform/slides/lib/font/league-gothic/league-gothic.css

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+@font-face {
+    font-family: 'League Gothic';
+    src: url('league-gothic.eot');
+    src: url('league-gothic.eot?#iefix') format('embedded-opentype'),
+         url('league-gothic.woff') format('woff'),
+         url('league-gothic.ttf') format('truetype');
+
+    font-weight: normal;
+    font-style: normal;
+}