Merge pull request 'Fix #3: Add README.md' (#4) from proj/add-readme into master

Reviewed-on: #4

README.md

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+# curly — Working solution to the Krul puzzle
+
+This tool will run a small compiler which implements the language from the (Krul
+puzzle)[https://bobpolis.com/krul/]. The sources also contain an older
+implementation, to be found in the interpreter files. This could also be used as
+a drop-in replacement for the compiler, by changing the appropriate line in
+`main.cpp`.
+
+## Building
+
+Build using:
+
+`make`,
+
+but first install the dependencies:
+
+- (libsclogging)[https://git.bobpolis.com/bob/libsclogging]
+- (libscterm)[https://git.bobpolis.com/bob/libscterm]
+- (libscrequest)[https://git.bobpolis.com/bob/libscrequest]
+- libcurl
+
+## Install
+
+`sudo make install`
+
+or, on OpenBSD:
+
+`doas gmake install`
+
+## Run
+
+`curly`
+