Merge changes from 2.6.1 release branch.

CHANGES.txt

-2014-10-09 version 2.6.1rc1:
+2014-10-20 version 2.6.1:
 
   C++
   * Added atomicops support for Solaris.

configure.ac

@@ -12,7 +12,7 @@ AC_PREREQ(2.59)
 # In the SVN trunk, the version should always be the next anticipated release
 # version with the "-pre" suffix.  (We used to use "-SNAPSHOT" but this pushed
 # the size of one file name in the dist tarfile over the 99-char limit.)
-AC_INIT([Protocol Buffers],[2.6.1rc1],[protobuf@googlegroups.com],[protobuf])
+AC_INIT([Protocol Buffers],[2.6.1],[protobuf@googlegroups.com],[protobuf])
 
 AM_MAINTAINER_MODE([enable])
 

java/pom.xml

@@ -10,7 +10,7 @@
   </parent>
   <groupId>com.google.protobuf</groupId>
   <artifactId>protobuf-java</artifactId>
-  <version>2.6.1rc1</version>
+  <version>2.6.1</version>
   <packaging>bundle</packaging>
   <name>Protocol Buffer Java API</name>
   <description>
@@ -148,7 +148,7 @@
           <instructions>
             <Bundle-DocURL>https://developers.google.com/protocol-buffers/</Bundle-DocURL>
             <Bundle-SymbolicName>com.google.protobuf</Bundle-SymbolicName>
-            <Export-Package>com.google.protobuf;version=2.6.1rc1</Export-Package>
+            <Export-Package>com.google.protobuf;version=2.6.1</Export-Package>
           </instructions>
         </configuration>
       </plugin>

python/setup.py

@@ -156,7 +156,7 @@ if __name__ == '__main__':
         ))
 
   setup(name = 'protobuf',
-        version = '2.6.1rc1',
+        version = '2.6.1',
         packages = [ 'google' ],
         namespace_packages = [ 'google' ],
         test_suite = 'setup.MakeTestSuite',