Renamed, relocated, and reformated the audit tool's readme file
diff --git a/test/audit/README.md b/test/audit/README.md
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+Typical usage
+=============
+```
+thrift.exe --audit <oldFile> <newFile>
+```
+Example run
+===========
+```
+> thrift.exe --audit test.thrift break1.thrift
+[Thrift Audit Failure:break1.thrift] New Thrift File has missing function base_function3
+[Thrift Audit Warning:break1.thrift] Constant const3 has different value
+```
+
+Problems that the audit tool can catch
+======================================
+Errors
+* Removing an enum value
+* Changing the type of a struct field
+* Changing the required-ness of a struct field
+* Removing a struct field
+* Adding a required struct field
+* Adding a struct field 'in the middle'. This usually indicates an old ID has been recycled
+* Struct removed
+* Oneway-ness change
+* Return type change
+* Missing function
+* Missing service
+* Change in service inheritance
+
+Warnings
+* Removing a language namespace declaration
+* Changing a namespace
+* Changing an enum value's name
+* Removing an enum class
+* Default value changed
+* Struct field name change
+* Removed constant
+* Type of constant changed
+* Value of constant changed
+
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