Ajout readme, Correction CSS

src/css/layout.scss

@@ -0,0 +1,72 @@
+.pagedjs_page_content > div {
+  height: 100%;
+}
+
+.layout {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+}
+
+.no-folio {
+  page: nofolio;
+}
+
+.blank-page {
+  page-break-after: always;
+}
+
+.image-bleed-left {
+  position: absolute;
+  width: calc(100% + 3mm);
+  height: calc(100% + 6mm);
+  margin-left: -3mm;
+  margin-top: -3mm;
+}
+
+.image-bleed-right {
+  position: absolute;
+  width: calc(100% + 3mm);
+  height: calc(100% + 6mm);
+  margin-top: -3mm;
+}
+
+.image-cover {
+  page: imagecover;
+  background-size: cover;
+  background-position: center;
+  background-color: lightgray;
+  background-repeat: no-repeat;
+}
+
+.cover-left {
+  background-position: 0 50%;
+}
+
+.cover-right {
+  background-position: -148mm 50%;
+}
+
+.grow {
+  flex: 1;
+}
+
+.column {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+}
+
+.justify-end {
+  justify-content: flex-end;
+}
+
+.canbreak {
+  page-break-before: always;
+}
+
+.v-center {
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+}