[Doc] Remove legacy files and update reference (#25)

* installation script fix

* readme typo fix

* doc fix for dequantize gemm

* [Doc] remove CODE_OF_CONDUCT.md and SECURITY.md; update references in CONTRIBUTING.md

Author: LeiWang1999

CODE_OF_CONDUCT.md

@@ -1,6 +1,6 @@
 # Contributing
 
-That would be awesome if you want to contribute something to BitBLAS!
+That would be awesome if you want to contribute something to TileLang!
 
 - [Contributing](CONTRIBUTING.md#contributing)
   - [Reporting Bugs](CONTRIBUTING.md#reporting-bugs)
@@ -11,7 +11,7 @@ That would be awesome if you want to contribute something to BitBLAS!
 
 ## Reporting Bugs
 
-If you run into any weird behavior while using BitBLAS, feel free to open a new issue in this repository! Please run a **search before opening** a new issue, to make sure that someone else hasn't already reported or solved the bug you've found.
+If you run into any weird behavior while using TileLang, feel free to open a new issue in this repository! Please run a **search before opening** a new issue, to make sure that someone else hasn't already reported or solved the bug you've found.
 
 Any issue you open must include:
 
@@ -25,15 +25,15 @@ Please ask questions in issues.
 
 ## Submitting Pull Requests
 
-All pull requests are super welcomed and greatly appreciated! Issues in need of a solution are marked with a [`♥ help`](https://github.com/ianstormtaylor/BitBLAS/issues?q=is%3Aissue+is%3Aopen+label%3A%22%E2%99%A5+help%22) label if you're looking for somewhere to start.
+All pull requests are super welcomed and greatly appreciated! Issues in need of a solution are marked with a [`♥ help`](https://github.com/ianstormtaylor/TileLang/issues?q=is%3Aissue+is%3Aopen+label%3A%22%E2%99%A5+help%22) label if you're looking for somewhere to start.
 
 Please run `./format.sh` before submitting a pull request to make sure that your code is formatted correctly.
 
 Please include tests and docs with every pull request!
 
 ## Repository Setup
 
-To run the build, you need to have the BitBLAS repository cloned to your computer. After that, you need to `cd` into the directory where you cloned it, and install the dependencies with `python`:
+To run the build, you need to have the TileLang repository cloned to your computer. After that, you need to `cd` into the directory where you cloned it, and install the dependencies with `python`:
 
 ```bash
 python setup.py install