corrected some grammar and spelling issues

LEGAL

@@ -5,4 +5,4 @@ All the files in this distribution are covered under the MIT license
 (see the file COPYING) except some files mentioned below:
 
 
-(currently no item are listed.)
+(Currently no items are listed.)

README

-!!Notice!! This is preliminary release for team reviewing.
-           the URL and address discribed below are not available yet.
+!!Notice!! This is a preliminary release for internal team reviewing.
+           The URL and address discribed below are not available yet.
            The official release will be announced later. Thanks.
 
 * What's mRuby
 
-mRuby is the light-weighted implementation of ruby language complied with ISO 
-standard to execute various environment. It can run as 'interpreter form' or
+mRuby is the light-weight implementation of the Ruby language complied to the ISO
+standard to execute various environments. It can run in 'interpreter form' or
 'compile and execute on vm form' according to its module construction.
 
 This achivement is due to the Regional Innovation Creation R&D Programs of