Add utilities and documentation

Add portable filesize and logging C libraries and documentation for development.

doc/2.0_DEVELOPMENT/2.5_LANGUAGE

@@ -0,0 +1,56 @@
+2.5 LANGUAGE
+============
+
+    DISCLAIMER: this file must be updated and adapted to this project.
+
+I. Organized Codebase
+---------------------
+
+    The program is primarily written in C, and is dispersed into a variety of
+optional modules; therefore, the inclusion of other languages, dialects, and
+platform-dependent components are permitted.
+
+    This project's core and a number of its direct dependencies conform to ISO
+9899:1990, which is generally referred to as Standard C90, and is functionally
+identical to ANSI X3.159-1989 "Programming Language C", which is Standard
+C89/ANSI-C. This ensures compatibilty between the basic functionality of the
+application and legacy/"retro" platforms, which support is planned for.
+
+    In the project's core, dialect-dependent features should be omitted, unless
+they are included within a preprocessor-directive that optionalizes their
+implmentation and separates their influence from the vital structure of the
+program.
+
+    Other languages and C-dialects can be used, but they must conform to the
+modular nature and goals of the program. By default, all extraneous and
+non-vital components should be disabled; compiler-flags and build-options will
+be the primary means of enabling them.
+
+II. Styling
+-----------
+
+        The source-code in this project is formatted to the "Allman" style of
+    indentation; see the provided example below:
+
+    while (x == y)
+    {
+        function();
+        function_2();
+    }
+
+        Note that braces align with the control statement, and statements placed
+    within the braces are indented.
+
+        Allman-style indentation maximizes the readability of the program and,
+    via a clear, block-like structure, reduces the probabilty of ambiguous
+    formatting.
+
+        Each source file must have a comment at the bottom marking the end of
+    its content e.g.
+
+            /* --- end of FILE_C --- */
+
+        The period located before the extension is shown as an underscore, and
+    the name is now capitalized, whereas the real filename is snake_case.
+
+--- end of 2.5 LANGUAGE ---