Set version 1.0.0

Add version information to the library:
- Added STACKMAN_VERSION_MAJOR, STACKMAN_VERSION_MINOR, STACKMAN_VERSION_PATCH macros
- Added STACKMAN_VERSION string macro ("1.0.0")
- Added STACKMAN_VERSION_NUMBER for numeric comparisons (10000)
- Updated README.md to display version 1.0.0

This establishes the library as stable and ready for production use
with all 8 platforms supported, tested, and documented.

Author: kristjanvalur

README.md

@@ -2,6 +2,8 @@
 
 # stackman
 
+**Version 1.0.0**
+
 Simple low-level stack manipulation API and implementation for common platforms
 
 ## Purpose

stackman/stackman.h

@@ -2,6 +2,19 @@
 #ifndef STACKMAN_H
 #define STACKMAN_H
 
+/* Version information */
+#define STACKMAN_VERSION_MAJOR 1
+#define STACKMAN_VERSION_MINOR 0
+#define STACKMAN_VERSION_PATCH 0
+
+/* Version as a string */
+#define STACKMAN_VERSION "1.0.0"
+
+/* Version as a single number for comparisons (MMmmpp: Major, minor, patch) */
+#define STACKMAN_VERSION_NUMBER ((STACKMAN_VERSION_MAJOR * 10000) + \
+                                 (STACKMAN_VERSION_MINOR * 100) + \
+                                  STACKMAN_VERSION_PATCH)
+
 /* the main include file.  The following macros can be defined before including
  * STACKMAN_OPTIONAL - Do not error if the platform isn't supported
  * STACKMAN_VERBOSE  - Emit the found platform to output