The check target did not depend on the test_plugin binary, so this would
cause "make check" to fail at times because of the absence of
test_plugin. This change adds a dependency on test_plugin so that it
will always get built before the tests are executed.

Until now this file was just checked into the repo, but actually it
should be generated from any.js, struct.js, and timestamp.js. This
change updates the build system to make this happen. To make it work I
also had to remove some C++11 features from embed.cc.

This is necessary so that the CMake build knows to include this header
file in the installation include/ directory.

This is necessary so that the CMake build knows to include this header
file in the installation include/ directory.

This pull request includes two implementation: C extension and PHP
package. Both implementations support encode/decode of singular,
repeated and map fields.

Removed excess endif()

Ruby: generated foo.proto -> foo_pb.rb instead of foo.rb.

This brings us more into line with other langauges, and makes it more
obvious when we are requiring protobuf generated code.

Add a script to build protoc zip packages.

[ci skip]

Change-Id: Ia0e0bf3bb6bd24633dc8f294318bb20ac837f8b9

Ruby: translate package names from snake_case -> PascalCase.

Added unit test for PascalCasing package names in Ruby.

Added new file to ruby_EXTRA_DIST.

A series of improvements:

- Improved Protobuf module compatibility (disabled by default);
- Hide advanced settings;
- Added build tree configuration;
- Added build of examples.

Update protobuf-config-version.cmake.in to correctly set the required variables (PACKAGE_VERSION_EXACT, PACKAGE_VERSION_COMPATIBLE, PACKAGE_VERSION_UNSUITABLE)