fix #248, format README

README.md

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+# xdotool
+Simulate input from the mouse and keyboard very easily.
+Also supports window manager actions such as moving, activating, and other actions on windows.
+## libxdo
+C library for doing the same.
+
+## Documentation
+See the [website](http://www.semicomplete.com/projects/xdotool/) or manpage (see below) for more up-to-date documentation.
+
+## Installation
+xdotool is included in many package managers
+
+|Operating System|command|
+|------|-------|
+|Arch Linux |`pacman -S xdotool`|
+|Debian/Ubuntu|`apt-get install xdotool`|
+|FreeBSD|`pkg install xdotool`|
+|Fedora|`dnf install xdotool`|
+|macOS|`brew install xdotool`|
+|OpenSUSE|`zypper install xdotool`|
+
+## Compilation
+
+Compile: `make`
+
+Run tests: `make test` (requires ruby, Xvfb)
+
+Install: `make install`
+
+Remove: `make uninstall`
+
+You may have to set `PREFIX` to the location you want to install to.
+The default `PREFIX` is `/usr/local`
+
+For packagers, there's also support for DESTDIR for staged install.
+
+Also, see the manpage, which you can generate by running `make showman`
+Note: the manpage will be installed during `make install`
+
+## Questions
+See the [FAQ](FAQ.md)