python: initial impl of bindings using cFFI

A PoC that exposes single function
`enry.language_by_extension()` and a small
number of helpers to deal with string
coversion between Go<->C<->Python.

Signed-off-by: Alexander Bezzubov <bzz@apache.org>

python/README.md

@@ -0,0 +1,29 @@
+# Python bindings for enry
+
+Python bingings thoug cFFI (API, out-of-line) for calling enr Go functions though CGo wrapper.
+
+## Build
+
+```
+$ make static
+$ python enry_build.py
+```
+
+Will build static library for Cgo wrapper `libenry`, then generate and build `enry.c` 
+- a CPython extension that
+
+## Run
+
+Example for single exposed API function is provided.
+
+```
+$ python enry.py
+```
+
+## TODOs
+ - [ ] try ABI mode, to aviod dependency on C compiler on install (+perf test?)
+ - [ ] ready `libenry.h` and generate `ffibuilder.cdef` content
+ - [ ] cover the rest of enry API
+ - [ ] add `setup.py`
+ - [ ] build/release automation on CI (publish on pypi)
+ -