"Programming in D" book, Message Passing Concurrency chapter

[Ali Çehreli]

I have continued with the translation of the book. At this point there 
is 313 pages in English of 681 pages in Turkish.

1) Translated the Message Passing Concurrency chapter:

   http://ddili.org/ders/d.en/concurrency.html

2) Translated more chapters from the beginning of the book:

* Associative Arrays
* foreach Loop
* switch and case
* enum
* Functions
* Immutability
* Function Parameters
* Lazy Operators
* Program Environment
* Exceptions
* scope
* assert and enforce

As a reminder, the book is available as PDF, downloadable from the 
header of each chapter:

   http://ddili.org/ders/d.en/index.html

No Kindle or Lulu versions yet.

Ali