Convert to Markdown and update with all official releases

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

ChangeLog.md

@@ -1,13 +1,97 @@
-0.9
-  * Complete rewrite of program (Every single byte)
-  * Cleaner, safer code
-  * Completely new intuitive usage (Sorry, it was needed)
-  * Added functionality:
-    * Ability to set/get minimum brightness directly from commandline
-    * Ability to specify the backlight controller to use directly from commandline
-    * Better verbosity
-
-  * Probably missed some stuff
-
-0.7
-  * Ported bash script to C.
+Change Log
+==========
+
+All relevant changes to the project are documented in this file.
+
+
+[v1.1.2][] - 2018-06-20
+-----------------------
+
+Panic release to fix save/restore.
+
+### Changes
+- Add help2man dependency in README
+- Better Support for Overriding Install Prefix
+- Restore DESTDIR support
+
+### Fixes
+- Issue #29: Fix save and restore arguments
+- Issue #27: Use the install command instead of raw cp/mv/chmod.
+
+
+[v1.1][] - 2017-11-23
+---------------------
+
+Various fixes and improvements.  Credits to Abdullah ibn Nadjo
+
+### Changes
+- Add `-k` flag for keyboard backlight support
+- Cache max brightness data from automatic controller detection
+- Improve overall logging
+- Logging of clamps, saves and restores
+- Support for save, restore, get [max] brightness etc. for both screen
+  and keyboard controllers
+
+### Fixes
+- Avoid checking for write permission if just getting value
+- Check if controller is accessible before getting value
+- Avoid redondant checking
+- Don't truncate file contents when checking if file is writable
+- Fix `light_controllerAccessible()` and `light_getBrightness()` this
+  functions were:
+   - Reading values from the controller
+   - Checking write permission even when we just want reading values
+   - Checking the mincap file instead of the actual controller
+- Don't try to read brightness values when only targetting max bright
+- Fix issues with string buffers and pointers
+  - Use `NAME_MAX` and `PATH_MAX` instead of hardcoded values
+  - Allow paths to be longer than 256 chars
+  - Check pointers everywhere
+  - Use `strncpy()`/`snprintf()` instead of `strcpy()`/`sprintf()`
+  - Validate controllers' name (`-s` flag + a very long name = bad
+    things happening)
+  - Get rid of globals for dir iteration
+
+
+[v1.0][] - 2016-05-10
+---------------------
+
+First major release.  Light has been around for a while now and seems to
+make some people happy.  Also someone wanted a new release, so here you
+go!
+
+### Changes
+- Added save/restore functionality
+- Generate man page on `make install`
+
+### Fixes
+- Issue #5: Can't increase brightness on ATI propietary driver
+- Issue #10: Honor `$DESTDIR` on man page installation
+
+
+[v0.9][] - 2014-06-08
+---------------------
+
+### Changes
+- Complete rewrite of program (Every single byte)
+- Cleaner, safer code
+- Completely new intuitive usage (Sorry, it was needed)
+- Added functionality:
+  - Ability to set/get minimum brightness directly from commandline
+  - Ability to specify the backlight controller to use directly from commandline
+  - Better verbosity
+- Probably missed some stuff
+
+
+v0.7 - 2012-11-18
+-----------------
+
+### Changes
+- Ported bash script to C
+
+
+[UNRELEASED]: https://github.com/haikarainen/light/compare/v1.1.2...HEAD
+[v1.1.2]:     https://github.com/haikarainen/light/compare/v1.1...v1.1.2
+[v1.1]:       https://github.com/haikarainen/light/compare/v1.0...v1.1
+[v1.0]:       https://github.com/haikarainen/light/compare/v0.9...v1.0
+[v0.9]:       https://github.com/haikarainen/light/compare/v0.7...v0.9