Fix typos in README.rst

Commit fixes some typos in README.rst

README.rst

@@ -22,7 +22,7 @@ psutil functions on some architectures.
 Migrating to v2
 -------------------------
 
-On gopsutil itself, `v2migration.sh <https://github.com/shirou/gopsutil/blob/v2/v2migration.sh>`_ is used for migration. It can not be commly used, but it may help to your migration.
+On gopsutil itself, `v2migration.sh <https://github.com/shirou/gopsutil/blob/v2/v2migration.sh>`_ is used for migration. It can not be commonly used, but it may help you with migration.
 
 
 Available Architectures
@@ -79,7 +79,7 @@ Documentation
 
 see http://godoc.org/github.com/shirou/gopsutil
 
-Requrement
+Requirements
 -----------------
 
 - go1.5 or above is required.
@@ -153,7 +153,7 @@ Current Status
 ------------------
 
 - x: work
-- b: almost work but something broken
+- b: almost works, but something is broken
 
 ================= ====== ======= ====== =======
 name              Linux  FreeBSD MacOSX Windows