UI & info box stuff, more English text, adds garden & statues to menu...

I've been working on some improvements to mainly the UI and info boxes, but there are some  other building related improvements too. Short changelog below, or see commits for full details.

* Adds gardens and statues to the build menu, plus different types of garden will be displayed now
* Adds info boxes for gardens, statues, plaza
* Adds new English localisation with way more strings included
* Improves market, granary and farm info boxes
* Makes more text localisable, notably overlay menu, top menu stuff, main menu
* Adds some tooltips from the original that were missing
* Fixes issue with some building data not being recognised because of wrongly spelt or differing names

Feedback welcome!