WIP: Moved sources int src/, separated most of the source code from Perl.

The XS was left only for the unit / integration tests, and it links
libslic3r only. No wxWidgets are allowed to be used from Perl starting
from now.

xs/src/png/NEWS

@@ -1,60 +0,0 @@
-Version 0.2.7:
-
-  - Added solid_pixel_buffer (patch by Andrey Potapov).
-
-  - Fixed some compilation problems on Win32.
-
-Version 0.2.5:
-
-  - Fixed compatibility with newer libpng versions (>= 1.4)
-
-  - Fixed compilation on FreeBSD.
-
-  - Fixed tRNS handling with transformations.
-
-  - Added IO transformation debugging facility.
-
-  - Better organized test suite.
-
-Version 0.2.3:
-
-  - Fixed numerous `already defined' errors due to require_color_space
-    implementation.
-
-  - Added `config.hpp'.
-
-  - Fixed `strerror' usage.
-
-  - Minor docs fixes.
-
-
-Version 0.2.1:
-
-  - Added support for tRNS chunk.
-
-  - Added non-std IO streams support.
-
-  - Fixed 16-bit endianness problems.
-
-  - Improved test script.
-
-
-Version 0.2.0:
-
-  - Added support for 16-bit data (RGB, RGBA, Grayscale and Gray+Alpha
-    color types)
-
-  - Added support for packed 1-, 2- or 4-bit pixels (Grayscale and
-    Indexed colors)
-
-  - Fixed interlace handling code which was severely broken
-
-  - Added possibility to process images without reading the entire
-    image into memory
-
-  - Internals are refactored while the client interface is mostly
-    unchanged
-
-  - Added intensive test suite
-
-  - Added documentation