Add php files for make dist. 

PHP alpha-1 release. 

Merge pull request protocolbuffers#2077 from pherl/3.0.x Update release date in the change log

Merge pull request protocolbuffers#1877 from pherl/javalite Bump lite version 3.0.1

Merge pull request protocolbuffers#1873 from pherl/javalite Fix Javalite Pom

Merge pull request protocolbuffers#1864 from pherl/galogs Change log for 3.0 GA release.

Protocol Buffers v3.0.0-beta-4 

Merge beta-3.1 and beta-3.2 

Protocol Buffers v3.0.0-beta-3.2 

Bump version number to beta-3.1