dlib 0.7.0 beta1

This is beta release, please test and report any bugs found.

• dlib.core
  • Added GC-free, Phobos-independent thread module - dlib.core.thread
• dlib.text
  • A new package for GC-free text processing. Includes UTF-8 decoder (dlib.text.utf8) and general-purpose lexical analyzer (dlib.text.lexer)
• dlib.xml
  • XML parser is now GC-free and based on dlib.text.lexer
• dlib.container
  • Added GC-free LinkedList (dlib.container.linkedlist), Stack (dlib.container.stack), Queue (dlib.container.queue)
• dlib.image
  • Fixed segfault with non-transparent indexed PNG loading
• dlib.math
  • Fixed error with instancing of vectors with size larger than 4
• Other improvements
  • Added Travis-CI support