Add readme info and changelog entry

Author: LefterisJP

README.org

@@ -30,6 +30,15 @@ Regardless of where you installed solidity mode from, you need to require the pa
 #+END_SRC
 (append that line to your =~/.emacs= file)
 
+You can also set the way the comments are inserted by emacs with commands like =comment-region=. The default is 
+=/* .. */= and you can turn it to using =//= instead by putting the following into your emacs config:
+
+#+BEGIN_SRC lisp
+(setq solidity-comment-style 'slash)
+;; or
+(setq solidity-comment-style 'star) ;; this is the default
+#+END_SRC
+
 ** Keymap
 You can modify the default keybindings of the solidity mode keymap by adding
 a new key combination for each command you want to change. For example

changelog.MD

@@ -2,6 +2,16 @@
 
 The changelog starts from version 0.1.4 as too much was added in each version before that.
 
+## Version 0.1.7
+
+- Allow for customization of the way that emacs inserts comments into the source file via
+
+```emacs-lisp
+(setq solidity-comment-style 'slash)
+;; or
+(setq solidity-comment-style 'star) ;; this is the default
+```
+
 ## Version 0.1.6
 
 - Add gas estimation code. User facing function is `solidity-estimate-gas-at-point`.