Updated image links (#650)

* Screenshot added

* Hosting plugin screenshot at github instead of on main site to avoid remote linking problem

* Image deleted

* Image URLs updated

Monero/monero-cny-bter.30s.sh

@@ -5,7 +5,7 @@
 # <bitbar.author>Monero.how</bitbar.author>
 # <bitbar.author.github>monerohow</bitbar.author.github>
 # <bitbar.desc>Shows the last Monero price (in CNY) on the Bter exchange</bitbar.desc>
-# <bitbar.image>https://www.monero.how/images/mac-menu-bar-light-and-dark.jpg</bitbar.image>
+# <bitbar.image>https://raw.githubusercontent.com/monerohow/misc/master/mac-menu-bar-light-and-dark.jpg</bitbar.image>
 # <bitbar.abouturl>https://www.monero.how</bitbar.abouturl>
 #
 # Visit https://www.monero.how for Monero tutorials, paper wallets and the latest Monero news

Monero/monero-usd-bitfinex.30s.sh

@@ -5,7 +5,7 @@
 # <bitbar.author>Monero.how</bitbar.author>
 # <bitbar.author.github>monerohow</bitbar.author.github>
 # <bitbar.desc>Shows the last Monero price (in USD) on the Bitfinex exchange.</bitbar.desc>
-# <bitbar.image>https://www.monero.how/images/mac-menu-bar-light-and-dark.jpg</bitbar.image>
+# <bitbar.image>https://raw.githubusercontent.com/monerohow/misc/master/mac-menu-bar-light-and-dark.jpg</bitbar.image>
 # <bitbar.abouturl>https://www.monero.how</bitbar.abouturl>
 #
 # Visit https://www.monero.how for Monero tutorials, paper wallets and the latest Monero news

Monero/monero-usd-poloniex.30s.sh

@@ -5,7 +5,7 @@
 # <bitbar.author>Monero.how</bitbar.author>
 # <bitbar.author.github>monerohow</bitbar.author.github>
 # <bitbar.desc>Shows the last Monero price (in USD) on the Poloniex exchange</bitbar.desc>
-# <bitbar.image>https://www.monero.how/images/mac-menu-bar-light-and-dark.jpg</bitbar.image>
+# <bitbar.image>https://raw.githubusercontent.com/monerohow/misc/master/mac-menu-bar-light-and-dark.jpg</bitbar.image>
 # <bitbar.abouturl>https://www.monero.how</bitbar.abouturl>
 #
 # Visit https://www.monero.how for Monero tutorials, paper wallets and the latest Monero news