doc: Refactor the build system for complete build dir docs

By structuring things differently, it becomes possible to have a
complete build of the docs in the build dir, without having to install
anything.

Signed-off-by: Sebastian Wick <sebastian.wick@redhat.com>

doc/publican/html/css/epub.css

@@ -0,0 +1,115 @@
+/*headings*/
+h1, h2, h3, h4, h5, h6,
+div.producttitle,
+div.subtitle,
+div.author div.author,
+div.translator div.translator,
+div.othercredit div.othercredit,
+div.editor div.editor,
+div.contrib div.contrib,
+.title,
+.titlepage .edition {
+}
+
+div.para {
+	margin-top: 1em;
+}
+/* inline syntax highlighting */
+.perl_Alert {
+	color: #0000ff;
+}
+
+.perl_BaseN {
+	color: #007f00;
+}
+
+.perl_BString {
+	color: #5C3566;
+}
+
+.perl_Char {
+	color: #ff00ff;
+}
+
+.perl_Comment {
+	color: #888888;
+}
+
+
+.perl_DataType {
+	color: #0000ff;
+}
+
+
+.perl_DecVal {
+	color: #00007f;
+}
+
+
+.perl_Error {
+	color: #ff0000;
+}
+
+
+.perl_Float {
+	color: #00007f;
+}
+
+
+.perl_Function {
+	color: #007f00;
+}
+
+
+.perl_IString {
+	color: #5C3566;
+}
+
+
+.perl_Keyword {
+	color: #002F5D;
+}
+
+
+.perl_Operator {
+	color: #ffa500;
+}
+
+
+.perl_Others {
+	color: #b03060;
+}
+
+
+.perl_RegionMarker {
+	color: #96b9ff;
+}
+
+
+.perl_Reserved {
+	color: #9b30ff;
+}
+
+
+.perl_String {
+	color: #5C3566;
+}
+
+
+.perl_Variable {
+	color: #0000ff;
+}
+
+
+.perl_Warning {
+	color: #0000ff;
+}
+
+b, strong {
+	font-weight: bolder;
+}
+
+code.command {
+	font-family: monospace;
+	font-weight: bolder;
+}