Add README

Author: aartikov

README.md

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+# Code Quality for Android
+[ ![Download](https://api.bintray.com/packages/1117847002272/CodeQuality-Android/CodeQuality-Android/images/download.svg?version=1.0.0) ](https://bintray.com/1117847002272/CodeQuality-Android/CodeQuality-Android/1.0.0/link)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+
+Gradle Plugin for integration of code quality tools with Gitlab CI.
+It converts Detekt and Lint reports to compatible with [Gitlab Code Quality](https://docs.gitlab.com/ee/user/project/merge_requests/code_quality.html) format.
+
+## Usage
+
+1) Add dependency
+```
+buildscript {
+
+    repositories {
+        ...
+        maven {
+            url  'https://dl.bintray.com/1117847002272/CodeQuality-Android'
+        }
+    }
+    dependencies {
+        ...
+        classpath 'ru.mobileup:code-quality-android:1.0.0'
+    }
+}
+```
+
+2) Setup plugin
+```
+apply plugin: 'ru.mobileup.code-quality-android'
+
+codeQuality {
+    reportsDirectory = file('build/reports')
+    issuesFile = rootProject.file('code_quality_issues.json')
+    collectInformationIssues = false
+}
+```
+
+3) Run your Detekt and Lint checks. 
+
+4) Run `gradlew collectCodeQualityIssues`. 
+Generated file (code_quality_issues.json) can be uploaded as [Gitlab Code Quality artifact](https://docs.gitlab.com/ee/ci/pipelines/job_artifacts.html#artifactsreportscodequality-starter).
+
+## License
+```
+MIT License
+
+Copyright (c) 2020 MobileUp
+
+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.
+```