ADD README.md and LICENSE

LICENSE

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+MIT License
+
+Copyright (c) 2024 Stephen Seo
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# AnotherMemCheck
+
+This software was created as an alternative to valgrind/memcheck.
+
+## Usage
+
+1. Build this software with cmake.
+2. Assuming the output library is called `libAnotherMemCheck.so`, run your
+   program with the `LD_PRELOAD` environment variable set to this library.
+
+        LD_PRELOAD=path/libAnotherMemCheck.so ./myProgram
+
+3. When the program exits, there should be diagnostic output from this library
+   showing all memory that has been `malloc`ed and not `free`ed. Note that some
+   memory will always be shown as having been not `free`ed (e.g. initializing
+   heap stuff for the program at start).