WIP add descriptions

This will later be used as an explenation

src/wip_descriptions/advanced-nomenclature.md

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+# Advanced Concepts
+
+- _Commit_\*: A commit is not in fact the set of changes, but a snapshot of the whole project at a time. This is the reason why git does not particularly want you to commit large binary files, because if a single bit is changed, git will store a whole new copy of the file.
+- _Hash_: Not only commits have hashes
+- _Porcelain_/_Plummbing_ commands: Porcelain commands are the one that a normal user would use (like `status`, `commit`, `log`, ... or in the real world analogy: the sink/toilet), so the high level ones. They themselves call the low level Plummbing commands in various combination to achieve the goal (real world: the toilet uses the plumbing to get fresh and get rid of the waste water). git provides you with them, in case you want/need to dig into some details, but for everyday use, you won't need them
+-

src/wip_descriptions/commit.md

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+# What is a _Commit_?
+
+The simplest view on commits is that they are a set of changes bundled together with a message 

src/wip_descriptions/simple-nomenclature.md

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+# Nomenclature
+
+This is the simple way to describe commonly used words in git. For simplification reasons some definitions contain statements that are in fact wrong (noted with a "\*"), but helpful for a first understanding. Once you are comfortable with these I would recommend you to look into the [advanced nomenclature](./advanced-nomenclature.md). Also that contains more advanced concepts that you might come across later.
+
+- _Commit_\*: a set of changes bundled together with a _Commit-Message_ describing what happened. Each commit has a unique _Hash_ that references it.
+- _Commit-Message_: A string describing the changes of a commit. The first line of it is called the title and it is shown in many places. It should give a general idea on what was done and should not be longer than ~50 characters. If that is not enough, you can append an empty line and afterwards you are free to write 
+- _Hash_: a hexadecimal (= digits + letters from a-f) string that is up to 40 characters long. It is usually abbreviated to 8 characters, but can be truncated more or less, as long as there is no other hash that starts with the same characters.
+- _Staging_\*: Preparing git to tell it which changes you want to bundle together in the next commit
+- _Status_: overview of the current project state telling you