Added header stack skeleton

git-svn-id: https://develop.sub.uni-goettingen.de/repos/textgrid/trunk/services/aggregator@13447 7c539038-3410-0410-b1ec-0f2a7bf1c452

src/main/java/info/textgrid/services/aggregator/TEIHeaderStack.java

+package info.textgrid.services.aggregator;
+
+/**
+ * Generates headers for every possible TEIcorpus level.
+ * 
+ * Clients initially create a new TEIHeaderStack for the root instance. This
+ * class will then prepare a path request and initialize the stack. Clients can
+ * afterwards push() new objects onto the stack while they descend into the hierarchy, 
+ * generate a header for the current stack, and pop() objects afterwards.
+ * 
+ */
+public class TEIHeaderStack {
+	
+	
+
+}