README: revisit README to fix typos and so on

This patch fixes typos and enhance description.

Suggested-by: Rob Maris <rob@maris-ee.eu>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/README b/README
index 77d9b49..4ea3356 100644
--- a/README
+++ b/README
@@ -7,7 +7,7 @@
 Before compilation
 ------------------
 
-Your should install the following packages.
+You should install the following packages.
  - libuuid-devel or uuid-dev
  - pkg-config
  - autoconf
@@ -19,13 +19,14 @@
 
 Before compilation initially, autoconf/automake tools should be run.
 
- # autoreconf --install
+ # ./autogen.sh
 
 How to compile
 --------------
 
  # ./configure
  # make
+ # make install
 
 How to cross-compile (e.g., for ARM)
 ------------------------------------
@@ -44,6 +45,6 @@
 How to run by default
 ---------------------
 
- $ ./mkfs.f2fs -l [LABEL] $DEV
+ $ mkfs.f2fs -l [LABEL] $DEV
 
 For more mkfs options, see man page.