Added new package ahead of gentoo main

dev-python/yapf/Manifest

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+DIST yapf-0.24.0.tar.gz 145607 SHA256 b249ee4a79f0bde2473ab2238dfbb311ae0e789b270779090f77df3269d74821 SHA512 daa61faaa2877af8bc8579b1f6a8e9cf177d1caf27e0430cc508b86b42d907186a0fe14913530368097b888f12c19fc601fbcc1c4e605341ca328e8bf40ea399 WHIRLPOOL 8c0ac36df289bd6fc8feb1e46a55877c588f701820bfec5aab1325c849bc085853c7bbb282afddc6ed68ce258548c7907b7a55ac637bdd3520988cb413d74ba6

dev-python/yapf/metadata.xml

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+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>horea.christ@gmail.com</email>
+		<name>Horea Christian</name>
+	</maintainer>
+		<maintainer type="project">
+		<email>proxy-maint@gentoo.org</email>
+		<name>Proxy Maintainers</name>
+	</maintainer>
+	<longdescription lang="en">
+		YAPF is based off of 'clang-format', developed by Daniel Jasper.
+		In essence, the algorithm takes the code and reformats it to the best
+		formatting that conforms to the style guide, even if the original code
+		didn't violate the style guide.	
+	</longdescription>
+</pkgmetadata>

dev-python/yapf/yapf-0.24.0.ebuild

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+# Copyright 2018 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python2_7 python3_{5,6,7} )
+inherit distutils-r1
+
+DESCRIPTION="A formatter for Python files"
+HOMEPAGE="https://github.com/google/yapf"
+SRC_URI="https://github.com/google/yapf/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="test"
+
+DEPEND="dev-python/setuptools[${PYTHON_USEDEP}]"
+RDEPEND="${DEPEND}"
+
+python_test() {
+	esetup.py test || die
+}