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