Java zip file execution strategy and refactorings

[vladislav-karamfilov]

• Implemented Java zip file (source files zip) execution
  • Implemented JavaZipCompiler class to compile all source files
  • Implemented JavaZipFileCompileExecuteAndCheckExecutionStrategy class that derives from JavaPreprocessCompileExecuteAndCheckExecutionStrategy and adds the sandbox executor in user's zip
• Improved the StandardProcessExecutor class by:
  • Set the process priority class to High
  • Added double check before killing the process and used WaitForExit() method after calling Kill() (as suggested in MSDN)
  • Added check for exited process before getting the value of process' PeakWorkingSet64 property
• Made some refactorings in JavaCompiler and JavaPreprocessCompileExecuteAndCheckExecutionStrategy classes
• Fixed a few typos

[NikolayIT]

I will merge it but please create a new pull request for the standard process in https://github.com/NikolayIT/RestrictedProcess.NET :smile:

[vladislav-karamfilov]

Of course. Will do in a few minutes. :)