Embed Google Maps display

[mediafinger]

• Display embedded Google Maps
• Allow to display more than one map per page
• Allow to dynamically create map via coordinates
• Allow to dynamically create map via address
• Implement the maximum number of features (e.g. more than one location, path between locations...)
• Keeping the usage free of charge even when displaying many maps each day / month

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Some requirements might not be possible to accomplish. In this case:

• suggest alternatives (e.g. different map provider, paid Google Maps features with rough cost estimates...)

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If it does not exist already, assume a Location model which has lat and lang coordinates, an address and a country_code attribute.

[mediafinger]

Done by:

• https://github.com/mediafinger/yournaling/pull/31
• https://github.com/mediafinger/yournaling/pull/34