README language fixes
README language fixes

Fix some wording, grammar, etc.

emq/redcarpet,Hacker0x01/redcarpet,liquorburn/redcarpet,Hacker0x01/redcarpet,kattybilly/redcarpet,gitcafe-dev/redcarpet,vmg/redcarpet,be9/redcarpet,kaneshin/redcarpet,liquorburn/redcarpet,fukayatsu/redcarpet,fukayatsu/redcarpet,JuanitoFatas/redcarpet,kaneshin/redcarpet,increments/greenmat,increments/greenmat,be9/redcarpet,Hacker0x01/redcarpet,fukayatsu/redcarpet,liquorburn/redcarpet,JuanitoFatas/redcarpet,vmg/redcarpet,be9/redcarpet,gitcafe-dev/redcarpet,kaneshin/redcarpet,emq/redcarpet,increments/greenmat,kattybilly/redcarpet,vmg/redcarpet,be9/redcarpet,emq/redcarpet,vmg/redcarpet,Hacker0x01/redcarpet,emq/redcarpet,kattybilly/redcarpet,gitcafe-dev/redcarpet,increments/greenmat,kaneshin/redcarpet,fukayatsu/redcarpet,liquorburn/redcarpet,kattybilly/redcarpet,JuanitoFatas/redcarpet