Changed some Brazil trade goods to improve historical accuracy and minor gfx fixes

[THGSCST]

Tobacco plantations in the middle of the jungle have been removed. Reduced spread of coffee plantations to the south. Increase of cattle in the interior of the country. Some minor climate corrections. Small increase in cotton, timber and rubber producing provinces.

(Note about Brazil rubber exports: the first record is from 1832, when the United Kingdom imported 23 tons. Representing less than 1% of total Brazilian exports. Therefore, rubber market already existed in the game timeline, but with minimal production and low demand.)

These sprites are not used in any GUI so they are never loaded by game engine: budget_diplomatic_balance.dds, budget_overseas_maintenance.dds, terrain_woods.tga, icon_religion_small.dds, politics_bureaucracy.dds

icon_religion .dds now has proper style Ibadi icon and improved Druze icon.

movement_strip_social.dds now has updated teddy bear icon and Border Policy icon has been included (for future use, if needed).

Cleaned unnecessary Mipmaps from big sized background sprites to free ~2Mbytes.

[arkhometha]

Hi @thiagodesacosta, thanks for this pull request.

From a quick count (which may be wrong), the final score for province changes are:
Tobacco: -3
Tropical Wood: -2
Rubber: +2
Grain: -5
Fruit: -1
Cattle: +3
Cotton: +1
Timber: +2
Coffee: -3

For future reference, I prefer these changes with some historical source behind them - economic production changed a lot betwen the 19th century and the 21st. Also note that sometimes changes are more intended for game balance, especially for the economy, though this is rare.

The unused elements in the GUI its images are not usually a problem and could have been used later, but I will look at these again if that happens.

[THGSCST]

I agree. I did not show the sources because they are all in Portuguese language. There are 3 different maps depicting the Brazilian economy in the 19th century and a specific map showing the spread of coffee between 1850 and 1950. Anyway here they are:

1. Panorama geográfico do Brasil, economia século XIX, São Paulo Moderna 2004, page 45. (See pic1)
2. Atlas do Brasil: disparidades e dinâmicas do território. São Paulo Edusp 2005, page 41 (See pic2)
3. Atlas da História do Brasil. São Paulo Scipione 1993, page 25 (See pic3)
4. Atlas para Estudos Sociais. Rio de Janeiro Ao Livro Técnico 1977 (See pic4)