Improve how the table with markdown tips for events is created

[mconf-daileon]

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Author Name: Leonardo Daronco (Leonardo Daronco) Original Redmine Issue: 1820, http://dev.mconf.org/redmine/issues/1820

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Currently there is a view named "markdown*" for each language available on Mconf-Web. These views store a table with formatting tips for the description of events that uses markdown. The strings in these views are not in the locales because the table is quite big, so it would be weird to store all its formatting in the locales. On the other hand, having a view for each language is also bad because we have to remember to add a new view whenever a new language is added (can generate bugs as in #1674) and also because the views are not as easily translated as locale files are (they are in an external tool that allows people to translate them).

So we have to find a solution to make it better, ideally keeping all strings in the locales and the formatting in the view.