Nix references to removed mach.sdl directory

examples/readme.md

@@ -2,8 +2,7 @@
 
 ## How to run
 
-Examples in this directory which do not depend on `mach.sdl` can be run
-simply using a command such as:
+Examples in this directory can be run simply using a command such as:
 
 ``` text
 rdmd -I"path/to/mach.d" "helloworld/helloworld.d"
@@ -12,29 +11,6 @@ rdmd -I"path/to/mach.d" "helloworld/helloworld.d"
 Note that the **rdmd** tool is packaged with the **dmd** compiler, which can be
 downloaded from the dlang website [here](https://dlang.org/download.html).
 
-Examples which demonstrate the `mach.sdl` package depend on the Derelict
-SDL2 and OpenGL3 bindings.
-In order to run these examples, the [DerelictSDL2](https://github.com/DerelictOrg/DerelictSDL2),
-[DerelictGL3](https://github.com/DerelictOrg/DerelictGL3), and
-[DerelictUtil](https://github.com/DerelictOrg/DerelictUtil) dependencies must
-be downloaded and placed in some directory and the examples can be run using
-a command such as:
-
-``` text
-rdmd -I"path/to/mach.d" -I"path/to/dir/containing/derelict/deps" "movepineapple/movepineapple.d"
-``` 
-
-Note that mach typically depends on the most up-to-date versions of these
-repositories, and downloading them automatically using **dub** may result in
-compiler errors if the dub packages are not recent.
-
-If running on **Windows**, the SDL2 DLLs must be available to the compiler.
-If compilation fails with the above command, try placing the DLLs in the same
-directory as the source file.
-If running on **OSX**, the SDL2 dylibs must be installed on the system.
-The DLLs and dylibs can be downloaded [here](https://www.libsdl.org/download-2.0.php)
-or [here](https://www.libsdl.org/projects/).
-
 ## What's in this directory
 
 ### helloworld
@@ -59,38 +35,3 @@ modified content to an output file.
 
 Traverses this examples directory and its subdirectories and
 finds and prints the paths of all the D source files contained in them.
-
-### movepineapple
-
-Initializes a window using `mach.sdl` and draws an image to the
-screen which can be moved using the WASD keys.
-
-### resizewindow
-
-Creates a resizable window which renders as text its current resolution,
-updating when the window is resized.
-
-### wireframe
-
-An example of a very basic software 3D renderer using matrix transformations
-and 2D rendering calls.
-
-### playmusic
-
-Plays music loaded from an OGG file, and pauses or resumes the music when the
-left mouse button is clicked.
-
-### playsamples
-
-Plays audio samples loaded from WAV files when the left and right mouse buttons
-are pressed.
-
-### fragshader
-
-An example of using an OpenGL fragment shader with mach. A shader loaded from an
-external GLSL file is used to draw to the displayed window.
-
-### sampler
-
-Renders an image using a fragment shader and a sampler uniform, where the
-sampled texture is loaded from an external file.

mach/text/numeric/readme.md

@@ -246,6 +246,10 @@ to a padded serialization function, a `NumberWriteError` will result except
 for when compiling in release mode. (In release mode the check is omitted, and
 the function may produce nonsense data.)
 
+If you want to write a negative integer with one of these functions, then
+you probably want to cast it to its unsigned complement before passing it
+to the write function.
+
 ``` D
 import mach.test.assertthrows : assertthrows;
 assert(byte(16).writehex == "10"); // Positive signed inputs ok.

readme.d

@@ -24,10 +24,6 @@ regularly tests on as many platforms as possible.)
 The majority of this package depends only on the druntime and D's standard library,
 Phobos, and I'm working on cutting out the remaining Phobos dependencies.
 
-The `mach.sdl` package requires some additional dependencies.
-See the [package readme](https://github.com/pineapplemachine/mach.d/blob/master/mach/sdl/readme.md)
-for details.
-
 ## Usage
 
 The `mach` folder should be placed where you are loading dependencies from.