Develop/custom map loading

[amistele]

Lots of Updates!!!

General / Miscellaneous

• Modified user inputs to sanitize inputs and re-prompt user after unrecognized inputs
• Generated tile minimum dimensions are now 16x16
• Custom map loading from custom_maps directory, with included templates for designing 16x16 and 32 x 32 dungeons!
• Updated spawn algorithm to search until an empty location is found, rather than only searching the second row. Allows for more customizability in dungeons
• Modified / updated README.md
• Forests are now lowercase f characters
• Minor color adjustments
• Improvements to computational complexity of movement algorithm by storing collision function outputs rather than using repeated function calls
• (Mostly) Finished dungeon MAIN_TEMPLE.txt! Try me out!

  New Dungeon Elements (do not naturally spawn in generated worlds)

• added w spike element, does damage when traversed
• added <,>,^,v ridge elements, can go in directions following the arrow and perpendicular to, cannot traverse against arrows
• added T sign element, displays information when stood on added 1,2,3,4,5,6,7 gateway elements:
  • only two instances of each may exist in a world
  • when stood on, player is transported from one instance of the character to the other
  • when player enters gateway, a mysterious message is displayed

    Still to do (later, later is good)

• Add lava element for dungeon design and perhaps in procedural world generation?
• README.md may need a few tweaks, especially since Kyle's last pull request
• Implement feature so that multiple grouped gateways can exist (i.e., so that instead of two corresponding gateways for each character, there can be multiple that the player can access from one, with destination randomized
• Haven't tested gateways for when gateway characters aren't used sequentially (e.g., when 2 gateways are used but 1 gateways aren't-- but it should theoretically work)

[amistele]

Ah...... ah, crap. Resolved merge conflict in tile_classes.py, but conflicts in adventure.py are really going to be a pain because Kyle added so much code in his last pull request..... May need to print out for comparison, because this.... this is a mess.