chore(project): 添加项目配置文件和忽略规则

- 添加 Babel 配置文件支持 ES6+ 语法转换
- 添加 ESLint 忽略规则和配置文件
- 添加 Git 忽略规则文件
- 添加 Travis CI 配置文件
- 添加 1.4.2 版本变更日志文件
- 添加 Helm 图表辅助模板文件
- 添加 Helm 忽略规则文件

.gitignore

@@ -0,0 +1,53 @@
+# maven ignore
+target/
+*.jar
+*.war
+*.zip
+*.tar
+*.tar.gz
+*.class
+.flattened-pom.xml
+dependency-reduced-pom.xml
+
+# eclipse ignore
+.settings/
+.project
+.classpath
+
+# idea ignore
+.idea/
+*.ipr
+*.iml
+*.iws
+
+# temp ignore
+*.log
+*.cache
+*.diff
+*.patch
+*.tmp
+/distribution/bin/
+/distribution/conf/
+/distribution/lib/
+/distribution/logs/
+/distribution/*/bin/
+/distribution/*/conf/
+/distribution/*/lib/
+/distribution/*/logs/
+/server/*root.*
+/server/.root.*
+/server/sessionStore/
+/server/db_store/
+/sessionStore/
+/test/sessionStore/
+/distribution/sessionStore/
+/distribution/*/sessionStore/
+/file_store/
+
+# system ignore
+.DS_Store
+Thumbs.db
+*.orig
+
+#h2
+*.db