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/SilphCo5F_2.asm

@@ -4,7 +4,7 @@ _SilphCo5EndBattleText4::
 	prompt
 
 _SilphCo5AfterBattleText4::
-	text "You're only on 5F."
+	text "You're only on 3F."
 	line "It's a long way"
 	cont "to my BOSS!"
 	done
@@ -53,8 +53,9 @@ _SilphCo5Text11::
 	line "only when traded"
 	cont "by link-cable."
 
-	para "Further testing is"	; changed due to increased number of new trade evos
-	line "needed to discover"
-	cont "more species that"
+	para "Further testing"		; changed due to increased number of new trade evos
+	line "will be needed to"
+	cont "discover any more"
+	cont "species that"
 	cont "evolve this way."
 	done