Update Changelog and bump version for 2.3 release.

Changelog

@@ -1,3 +1,22 @@
+== 2.3 Update Release ==
+Fix multiple crashes for some corner cases.
+Increase max block size for variable dedup block sizes greater than 16KB.
+Update test cases and fix a test script bug.
+Use wrapper script to set paths when launching pcompress from build directory.
+Use smaller max block size when doing global dedupe.
+Fix init of executable name.
+Make data partitioning between threads more effective.
+Remove unnecessary computation to make Fixed block chunking faster.
+Fix Dedupe Mode initialization.
+Improve accuracy of the KMV sketch computation and speed it up.
+Reduce similarity indicators to reduce memory use with low impact on dedupe ratio.
+Add missing init of rabin block size.
+Reduce a rollign hash parameter for a slight speedup with no side effect.
+Update README with pointers to relevant analysis and documentation.
+Remove an rpath entry meant for testing.
+Make default symbol visibility to hidden with explicit public visibility specified.
+Add missing static scope to a few more places.
+Make Pcompress functionality into a library - initial changes.
 == 2.2 Bugfix Release ==
 Update invalid environment variable handling to actually fail rather than auto-correct.
 Fix a crash with invalid PCOMPRESS_CHUNK_HASH_GLOBAL.

INSTALL

@@ -5,7 +5,7 @@ Prerequisites
 64-bit System.
 GCC 4.4 (with mpfr, ppl and cloog support packages for loop
 	 vectorization).
-libz (zlib) and developments packages.
+libz (zlib) and development packages.
 Libbz2 and development packages.
 Libbsc source tree if BSC support is desired.
 	 See below:

pcompress.h

@@ -44,7 +44,7 @@ extern "C" {
 #define	FLAG_DEDUP	1
 #define	FLAG_DEDUP_FIXED	2
 #define	FLAG_SINGLE_CHUNK	4
-#define	UTILITY_VERSION	"2.2"
+#define	UTILITY_VERSION	"2.3"
 #define	MASK_CRYPTO_ALG	0x30
 #define	MAX_LEVEL	14