Add historical information to NEWS file

AUTHORS

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+* Shane Canon <[email protected]> (Initial and lead developer.)
+* Larry Pezzaglia <[email protected]>

NEWS

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+CHOS 0.11.2                 2013-06-27
+======================================
+ * Modify the method of setting the CHOS mapping of new processes to
+   address some scenarios identified by Doug Jacobsen of NERSC where
+   children of very short-lived processes would not inherit a CHOS
+   context
+
+CHOS 0.11.1                 2012-10-29
+======================================
+ * Fix issue where it was not possible to switch
+   from the "/" environment back to the previous environment.
+
+ * Revert "If an invalid CHOS environment is requested, fall back to
+   the "default" until it can be implemented as a configurable
+   behavior.
+
+CHOS 0.11                   2012-10-02
+======================================
+ * If an invalid CHOS environment
+   is requested, fall back to the "default" environment.
+
+ * Several change to facilitate building under EL6.
+
+ * Add support for a special "root" environment with a path of "/".
+   Selecting the root environment results in a complete exit from
+   CHOS.
+
+ * Multiple code cleanups and build system improvements.