Post-release bugfixes: Batch 1

This commit fixes the following bugs:

- A guy in Celadon University was stuck in a tree due to being placed on the wrong tile.

- It was possible to walk out of bounds in Mt. Moon Crater due to buggy collision near the bottom of the map

- Hi Jump Kick had a slightly glitched animation

- It was possible to walk into a specific rock in both Cerulean Cave and Garnet Cavern. This was a vanilla bug too, but I'm fixing it proper now.

- There was no signpost outside Bill's Lighthouse where there should've been.

- Fixed two errors in the README

- The Fissure TM was not purchasable at the Citrine Rocket house

- Even if you had picked one of the original starters, you could still get the Charmander and Squirtle gifts as the NPCs would show up regardless.

- Trying to get the Squirtle gift with a full party and box would lock you out from getting it

- Fixed a text issue in Celadon Uni where the professor states the wrong TM

- Fixed two text issues in Silph Co

text/SilphCo7F.asm

@@ -113,19 +113,19 @@ _SilphCo7AfterBattleText2::
 	done
 
 _SilphCo7BattleText3::
-	text "I am one of the 4"
-	line "ROCKET BROTHERS!"
+	text "TEAM ROCKET has"
+	line "taken command of"
+	cont "SILPH CO.!"
 	done
 
 _SilphCo7EndBattleText3::
-	text "Aack!"
-	line "Brothers, I lost!"
+	text "Arrgh!"
 	prompt
 
 _SilphCo7AfterBattleText3::
-	text "Doesn't matter."
-	line "My brothers will"
-	cont "repay the favor!"
+	text "Fwahahaha!"
+	line "My BOSS has been"
+	cont "after this place!"
 	done
 
 _SilphCo7BattleText4::