Update README: correct references to the config file and its location
Merge pull request #4 from AlisterH/patch-1

Update README: correct references to the config file and its location
Add simple undo functionality.

An extra backing surface is used to record the screen state between
strokes. Adds "gromit-mpx --undo" and "gromit-mpx --redo" commands.
Both have the same effect, swap undo backing surface and current
backing surface. Prepares for future multiple levels of undo and redo.
Add multiple levels of undo/redo.

Allows undo/redo using --undo and --redo commands. Currently preallocates
large surfaces to save entire drawing state, wastes memory.
Update documentation for undo/redo.
Add undo/redo menu items to systray menu.
Add undo/redo hotkey.

Press of undo hotkey is undo, shift-press is redo.
No action when window is hidden.
Document undo/redo hotkey binding.
Merge pull request #8 from nwhitehead/undo

Add simple undo functionality.
Move X11 specific stuff into input.c, prepping for native Wayland support some time.
Add GDK platform support check.
Put the backend check into the backend specific file.
Update README to reference similar tools

Adding some references to equivalent or similar utilities for Windows (and Linux) works both ways - would make it easier to find this if you know the windows tools, and helps those who (like me) find the Linux utility but have a hard time finding the windows equivalent.
Merge pull request #10 from TaoK/patch-1

Update README to reference similar tools
trim whitespace in README
mv README README.md
markdown-ify README.md
further markdown-ify README.md
Merge pull request #11 from barak/upstream

Upstream
inform build system that README is now README.md