add entire atmosphere source code and also add ram timing fixes

Source/Atmosphere/docs/building.md

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+# Building Atmosphère
+Building Atmosphère is a very straightforward process that relies almost exclusively on tools provided by the [devkitPro](https://devkitpro.org) organization.
+
+## Dependencies
++ [devkitA64](https://devkitpro.org)
++ [devkitARM](https://devkitpro.org)
++ [Python 2](https://www.python.org) (Python 3 may work as well, but this is not guaranteed)
++ [LZ4](https://pypi.org/project/lz4)
++ [PyCryptodome](https://pypi.org/project/pycryptodome) (optional)
++ [hactool](https://github.com/SciresM/hactool)
+
+## Instructions
+1. Follow the guide located [here](https://devkitpro.org/wiki/Getting_Started) to install and configure all the tools necessary for the build process.
+
+2. Install the following packages via (dkp-)pacman:
+    + `switch-dev`
+    + `switch-glm`
+    + `switch-libjpeg-turbo`
+    + `devkitARM`
+    + `devkitarm-rules`
+    + `hactool`
+
+3. Install the following library via python's package manager `pip`, required by [exosphere](components/exosphere.md):
+    + `lz4`
+
+4. Finally, clone the Atmosphère repository and run `make` under its root directory.