Considerable cleanup of installation docs

docs/source/Howto/Starting/Part1/Evennia-Library-Overview.md

@@ -16,7 +16,7 @@ what you can download from us. The github repo is also searchable.
 
 Finally, you can clone the evennia repo to your own computer and read the sources locally. This is necessary
 if you want to help with Evennia's development itself. See the
-  [extended install instructions](../../../Setup/Extended-Installation.md) if you want to do this.
+  [extended install instructions](../../../Setup/Installation-Git.md) if you want to do this.
 
 ## Where is it?
 

docs/source/Howto/Starting/Part1/Gamedir-Overview.md

@@ -200,7 +200,7 @@ people change and re-structure this in various ways to better fit their ideas.
 
 - [batch_cmds.ev](github:evennia/game_template/world/batch_cmds.ev) - This is an `.ev` file, which is essentially
     just a list of Evennia commands to execute in sequence. This one is empty and ready to expand on. The 
-    [Tutorial World](./Tutorial-World-Introduction.md) was built with such a batch-file.
+    [Tutorial World](./Tutorial-World.md) was built with such a batch-file.
 - [prototypes.py](github:evennia/game_template/world/prototypes.py) - A [prototype](../../../Components/Prototypes.md) is a way
     to easily vary objects without changing their base typeclass. For example, one could use prototypes to 
     tell that Two goblins, while both of the class 'Goblin' (so they follow the same code logic), should have different 

docs/source/Howto/Starting/Part1/More-on-Commands.md

@@ -144,7 +144,7 @@ change (no code changed, only stuff in the database).
 
 The commands of a cmdset attached to an object with `obj.cmdset.add()` will by default be made available to that object
 but _also to those in the same location as that object_. If you did the [Building introduction](./Building-Quickstart.md)
-you've seen an example of this with the "Red Button" object. The [Tutorial world](./Tutorial-World-Introduction.md)
+you've seen an example of this with the "Red Button" object. The [Tutorial world](./Tutorial-World.md)
 also has many examples of objects with commands on them.
 
 To show how this could work, let's put our 'hit' Command on our simple `sword` object from the previous section.

docs/source/Howto/Starting/Part1/Starting-Part1.md

@@ -25,7 +25,7 @@ and share with others!
 
 1. Introduction (you are here)
 1. [Building stuff](./Building-Quickstart.md)
-1. [The Tutorial World](./Tutorial-World-Introduction.md)
+1. [The Tutorial World](./Tutorial-World.md)
 1. [Python basics](./Python-basic-introduction.md)
 1. [Game dir overview](./Gamedir-Overview.md)
 1. [Python classes and objects](./Python-classes-and-objects.md)
@@ -79,7 +79,7 @@ things don't change much from year to year. Popular choices for Python are PyCha
 
 ### Set up a game dir for the tutorial
 
-Next you should make sure you have [installed Evennia](../../../Setup/Setup-Quickstart.md). If you followed the instructions
+Next you should make sure you have [installed Evennia](../../../Setup/Installation.md). If you followed the instructions
 you will already have created a game-dir. You could use that for this tutorial or you may want to do the
 tutorial in its own, isolated game dir; it's up to you.
 

docs/source/Howto/Starting/Part3/Tutorial-for-basic-MUSH-like-game.md

@@ -660,6 +660,6 @@ The simple "Power" game mechanic should be easily expandable to something more f
 useful, same is true for the combat score principle. The `+attack` could be made to target a
 specific player (or npc) and automatically compare their relevant attributes to determine a result.
 
-To continue from here, you can take a look at the [Tutorial World](../Part1/Tutorial-World-Introduction.md). For
+To continue from here, you can take a look at the [Tutorial World](../Part1/Tutorial-World.md). For
 more specific ideas, see the [other tutorials and hints](../../Howto-Overview.md) as well
 as the [Evennia Component overview](../../../Components/Components-Overview.md).