Fixed link behavior.

* Removed the automatic document table heading based on the document id.
* Fixed the way 'absolute' links were resolved in `Processor`. A leading `/` for
  a link passed into `Processor.resolveLink` really means "resolve as if I am
  starting from the documentation root."
* Moved the default logging configuration out of the final jar path. This is to
  help with environments that have multiple projects in the same classpath and
  therefore may have multiple `logback.groovy` configurations loading.
* Tweaked CSS.

resources/release/logback.groovy

@@ -0,0 +1,17 @@
+import ch.qos.logback.classic.encoder.PatternLayoutEncoder
+import ch.qos.logback.core.ConsoleAppender
+import ch.qos.logback.core.FileAppender
+
+import static ch.qos.logback.classic.Level.*
+
+appender("stdout", ConsoleAppender) {
+    encoder(PatternLayoutEncoder) {
+        pattern = "%level %msg%n" }}
+
+appender("logfile", FileAppender) {
+    file = "jlp.log" 
+    encoder(PatternLayoutEncoder) {
+        pattern = "%date %level %logger{10} [%file:%line] %msg%n" }}
+
+root(WARN, ["stdout"])
+//logger("com.jdblabs.jlp", TRACE, ["file"])