Fix demo example import file paths for LineNumbers plugin
Fix demo example import file paths for LineNumbers plugin

jfcere/ng2-markdown-to-html,jfcere/ng2-markdown-to-html,jfcere/ng2-markdown-to-html,jfcere/ng2-markdown-to-html,jfcere/ng2-markdown-to-html,jfcere/ng2-markdown-to-html