Moved changelog and compiling to own files and updated usage info in README.md.

CHANGELOG.md

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+####Version history:
+######0.0.5
+  - IPv6 support!
+     * Thanks to 'Tanja84dk' for addressing the real need of IPv6.
+
+  - Fixed bug causing crash / segmentation fault (invalid write) when receiving malformed rcon packet.
+
+  - Program makes use of C99 feature (variable-length arrays) so "-std=gnu99" flag on
+    GCC-compiler must be used to avoid unecessary warnings.
+
+  - Rcon receive buffer is now bigger (2024 bytes -> 10240 bytes).
+     * Thanks to 'gman_ftw' @ Bukkit forums.
+
+  - Fixed invalid error message when receiving empty rcon packet (10 bytes).
+     * Thanks to 'pkmnfrk' @ bukkit forums.
+
+  - Terminal mode now closes automatically when rcon socket is closed by server
+    or if packet size cannot be retrieved correctly.
+
+  - Client now tries to clean the incoming socket data if last package was out of spec.
+
+######0.0.4
+  - Reverted back to default getopts options error handler (opterr = 1).
+    Custom error handler requires rewriting.
+  - Some cosmetic changes in program output strings.
+  - Program usage(); function now waits for enter before exiting on Windows.
+
+######0.0.3
+  - Colors are now supported on Windows too!
+  - Terminal mode is now triggered with "-t" flag. "-i" flag still works for
+    backwards compatibility.
+  - Bug fixes (Packet size check always evaluating false and color validity
+    check always evaluating true).
+
+######0.0.2
+  - License changed from 'ISC License' to 'zlib/libpng License'.
+  - Bug fixes & code cleanups
+  - Interactive mode (-i flag). Client acts as interactive terminal.
+  - Program return value is now the number of rcon commmands sent successfully.
+    If connecting or authentication fails, the return value is -1.
+  - Colors are now enabled by default. Now '-c' flag disables the color support.
+
+######0.0.1
+  - Added experimental support for bukkit colors.
+    Should work with any sh compatible shell.
+  - Packet string data limited to max 2048 (DATA_BUFFSIZE) bytes.
+    No idea how Minecraft handles multiple rcon packets.
+    If someone knows, please mail me so I can implement it.
+
+####TODO:
+  - Make the receive buffer dynamic??
+  - Change some of the packet size issues to fatal errors.
+  - Code cleanups.
+  - Check global variables (remove if possible).
+  - Add some protocol checks (proper packet id check etc..).
+  - Preprocessor (#ifdef / #ifndef) cleanups.
+  - Follow valve rcon protocol standard strictly?
+  - Multiple packet support if minecraft supports it?!
+  - Investigate if player chat messages gets sent through rcon.
+    If they are, the messaging system requires rewriting.
+  - Name resolving should be integrated to connection creation function.
+  - Dont try to cleanup the socket if not authenticated
+  - Better sockets error reporting
+  - Better error function (VA_ARGS support)