D Language update

Things have a little bit evolved since the last time I checked the D programming language web site. An updated pdf version of the D language specification is available and the poseidon IDE is catching momentum.

There are some other nice features I forgot to mention in the previous note. Here is a short list:

   - static asserts and if evaluated at compile time
   - mixins of code and templates
   - contract programming (pre and post conditions)
   - version and debug keywords for conditional compilation
   - scopes

There are probably more gems in there, but these are a good start to catch the added value of D compared to other programming languages. Note that D is not an academic research product. It has been created by compiler writers that capitalized their experience in designing a new and better language.