* Install rake compiler
* Add kokoro config to build ruby gem on linux
* Rename from linix to linux
* Fix prepare_build.sh name
* Clean up
* Install bundler
* Install bundler
* Use c99 in order to build gem on mingw-32 on ruby 2.0.0
See https://github.com/rake-compiler/rake-compiler-dock/issues/4
* Move c99 config to extcofig.rb
This configuration builds both 32-bit and 64-bit binaries for Mac OS X.
One thing I had to change was to increase our minimum supported version
for 10.7 to 10.9, because 10.9 (Mavericks) appears to be the earliest
version supporting C++11.
This will allow SourceLink as per #4179, and mean that we can use C#
7.0 language features in the library (but not in generated code).
This does not affect which platforms we're *targeting*, so end users
won't see any difference.
It would be nice to update to 2.1.4, but AppVeyor's "Visual Studio
2017" environment is only 2.0.3.
Paul Yang
Adam Cozzette
Feng Xiao
Yilun Chong
Carlos O'Ryan
Thomas Van Lenten
Jon Skeet
Matt Kwong