Add INI support

examples/sample.ini

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+
+; This is a INI document
+
+[owner]
+name = "Tom Preston-Werner"
+dob = 1979-05-27T07:32:00-08:00
+
+[database]
+db_host = "localhost"
+db_port = 5432
+db_user = "postgres"
+db_password = ""
+db_name = "postgres"
+

examples/sample_no_sections.ini

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+
+; This is a INI document
+name = "Tom Preston-Werner"
+dob = 1979-05-27T07:32:00-08:00
+enabled = true
+ip = "10.0.0.1"
+role = "frontend"
+treads = 4