Added a readme?

README.md

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+# Petal: a fast applications language with metaprogramming
+
+![Petal logo](https://git.ikeran.org/petal-lang/petalc/raw/commit/aa68b4749e8d34126e095f27ee3bbb770a143e9a/petal.svg)
+
+For developing core libraries, OS kernels, or distributed lock stores scaling to a thousand requests
+a second, you want something with no overhead.
+
+Let's face it, most of the code we write is regular applications running at human scales in human
+time. We want to get something that works, fast. And we'd like something that works fast.
+
+That's where Petal comes in.
+