Update README.

README.md

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-# cpuset
+## CpuSet
 
+CpuSet is small C-written application providing a frontend to mechanism for assigning a set of CPUs and Memory
+Nodes to a set of tasks. Cpusets constrain the CPU and Memory placement of tasks to only the resources within
+a task's current cpuset by utilizing a cgroups mechanism.
+
+This small application is designed to be used with QEMU. Available arguments:
+ * -e: Enables the 'host' cgroup and moves all possible tasks into it, except the parent process. Thanks to that,
+ 		the console stays at root group and allows to launch qemu outside of the group with limited resources.
+ * -d: Disabled to 'host' group and reverts all changes.
+ * -c: Specifies the CPU cores assigned for 'host' group
+ * -m: Memory Node assigned for 'host' group
+
+## Usage Example
+	#!/bin/sh
+	cpuset -e -c 0-1,8-9 -m 0
+	qemu-system-x86_64 (...)
+	cpuset -d
+
+If script is not being launched as root, cpuset binary needs to have SETUID enabled!