tweaked EnvPropagateSpec
replaced "invoke a server" with "start a server"
Add new client written by golang

The current build configuration is temporary. It will be thoroughly restructured.
Pass all tests fo golang client event in windows
Amend a way of integration test thoroughly
Avoid hard code of package name of groovyserv for AnsiColor#printlnAsTestResult() when testings
Extract a local AnsiColorConsoleLogPlugin with AnsiColor and StopWatch to buildSrc
Tweak groovyclient.go
Tweak build.gradle

- 'natives' -> 'platform'
- split 'compileGo' with 'crossCompileGo'
Add new groovyserver written by go
Arrange a package structure of golang source code
Use a different port number for each spec methods
Become independent from ServerCLI
Remove unused helper methods in build.gradle
Add the test which can find a bug when a command receives a response body over a buffer size
Remove test.single support

Instead, you should use a filter feature with --tests option.
Use isPrefix for bufio.ReadLine
Add ThreadGroup to a log line
Ignore an empty request without logging as error level
Fix lack of handling an error