Some small typo fixes and similar stuff.

I fixed an error where the tooltip for farms said they contain (225/350/525) food with upgrades instead of the correct (250/375/550).

I also returned the Saracen's archer anti-building bonus description back to the original +1/+3 instead of +2/+4. The latter is technically correct, but due to the way damage is calculated in aoe and the high pierce armor of buildings, in effect it's almost always +1/+3, so the other values might be misleading.

The tech tree was missing the free town watch bonus for the byzantines.

Changed some UU descriptions where the elite counter part was missing the "elite" in its name, as well a not-working linebreak for the elite boyar.

Added a more detailed description of the Feitoria in the civ bonus overview.

Renamed "Attack rate" to "reload time" to clarify how it works and that a lower number is better.
Corrected the teuton civ bonus, where I've missed that they get +10 garrison and +5 max arrows on their TCs

Clarified the description of Parthian Tactics

Added how Camel/Elephant Archers are affected by Thumb Ring

Changed some formatting, fixed an error where the guard tower upgrade said +1 attack even though it's +2

Changed the formatting, corrected that Chemistry does affect Town Centers, Castles, switched the description of demo ships/fire galleys around, various others fixes I don't remember.