refactoring of code to support themes and new hellug theme

themes/hellug-minimal/theme.toml

@@ -0,0 +1,15 @@
+# theme.toml template for a Hugo theme
+# See https://github.com/gohugoio/hugoThemes#themetoml for an example
+
+name = "Hellug Minimal"
+license = "MIT"
+licenselink = "https://github.com/yourname/yourtheme/blob/master/LICENSE"
+description = "A theme for Hellug site"
+homepage = "http://hellug.gr/"
+tags = ["blog"]
+features = ["blog"]
+min_version = "0.1.0"
+
+[author]
+  name = "Hellug"
+  homepage = "https://hellug.gr"