refs #1320 :  added - explanation about ajax comment option behavior.

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refs #1705, #1721 : Let reCAPTCHA work when comment auto-expansion is on.
 refs #1712 : removed - eolin-related resources

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 refs #1712 : removed - eolin-related resources.

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 refs #1722 : modified - color tone of editor buttons.

 - Uses 'light' theme from
 http://pixabay.com/en/blog/posts/a-modern-custom-theme-for-tinymce-4-40/
refs #1705, #1721: More robust comment view check.
 refs #1723 : bugfix - function name changed from save to saveEntry

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 refs #1715 : modified - changelog

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 refs #1715 : updated - documentation

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refs #1705, #1721: Super-robust reCAPTCHA initialization.

 * Even the network latency (RTT) is larger than our element checking
   interval, it works correctly.

 * Previous version had lost the recaptcha control due to interruption
   of the AJAX call initiated by Google scripts.