Merge pull request #22 from knf/patch-3

Made text edits to README.md to improve clarity.

README.md

@@ -9,7 +9,7 @@
 
 mruby is the lightweight implementation of the Ruby language complying to
 the [ISO standard](http://www.ipa.go.jp/about/press/20120402_2.html). 
-mruby can run Ruby code in 'interpreter mode' or 'compile and execute it on a virtual machine' depending on how the developer's preference.
+mruby can run Ruby code in 'interpreter mode' or 'compile and execute it on a virtual machine' depending on the developer's preference.
 
 This achievement was sponsored by the Regional Innovation Creation R&D Programs of
 the Ministry of Economy, Trade and Industry of Japan.
@@ -61,7 +61,7 @@ The URL of the mruby home-page will be:
 
 ## Mailing list
 
-To subscribe the mruby mailing list....[T.B.D.]
+To subscribe to the mruby mailing list....[T.B.D.]
 
 
 ## How to compile and install
@@ -78,19 +78,19 @@ See the COPYING file.
 
 Thank you for considering contributing to mruby.
 mruby has chosen a MIT License due to its permissive license allowing
-developer to target various environments such as embedded systems.
-However, the license requires to display the copyright notice and license
+developers to target various environments such as embedded systems.
+However, the license requires the display of the copyright notice and license
 information in manuals for instance. Doing so for big projects can be 
 complicated or troublesome.
-This is why, mruby has decided to display "mruby developers" as copyright name
+This is why mruby has decided to display "mruby developers" as the copyright name
 to make it simple conventionally.
-In the future, mruby might ask you to distribute your new codes
-(that you will commit,) under MIT License as a member of
+In the future, mruby might ask you to distribute your new code
+(that you will commit,) under the MIT License as a member of
 "mruby developers" but contributors will keep their copyright.
 (We did not intend for contributors to transfer or waive their copyrights,
  Actual copyright holder name (contributors) will be listed in the AUTHORS file.)
 
-Please ask us if you want to distribute your code under other license
+Please ask us if you want to distribute your code under another license
 or if your code is derived from GPL code.