* add Architecture-CN.md doc.

* Typo:fix some problems in doc.

* Add a separated use case list

* Update README_ZH.md

* Create use-case-list.md

Add use cases.

* Update README.md

* Update README_ZH.md

* Update README_ZH.md

* Added OpenAPM Badge to readme

* Update README.md

* Fix RuntimeContext cannot store anything when the trace is not create

* Add RuntimecontextSnapshot and remove debug info

* Update How-to-build-CN.md

* Typo:fix some duplication problems in docs

* Update Direct-uplink-CN.md

Fix #1435

* first commit

* ad

* add

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* 调整和修改中间件，框架与类库支持列表 目录文档

* add

* add

* 修改Incubating

* add

* #1447

Fixed the after method interceptor for the apache http client NPE error when the response is null cause by the doExecute method throw a exception.

Add an announcement for 6.0

* Change version 

Make the icon font things more clear in NOTICE, include where they are in our source folder. Also move the text at the beginning of the distribution NOTICE file. (#1444)

* Fix #1441 add icon files notice

* Amend notice file, add excluding icon folder in rat config

Sync English documents to Chinese.

* Add Junit test for ribbon's NIWSServerListClassName

* Add License Head to Code file

* try to solve submodule skywalking-ui conflict

Fixed the bug of the result of GC count in query of GC trend service always 0.

* Update How-to-release.md

* Update create_source_release.sh

* Update README.md

* Update README_ZH.md

Error rate alarm is not triggered

* Update submodule skywalking-ui

* Update submodule skywalking-ui

* Update submodule skywalking-ui

* Update submodule skywalking-ui

* #1405
Add application id into service metric for the page jump from overview page to service page.

* Fixed test case error.

* Update submodule skywalking-ui

* Update submodule skywalking-ui

* Update submodule skywalking-ui

* Fixed the wrong usage of elasticsearch filter.

* #1393

The array data type of service name column are nested. Change the data type to be just a one-dimensional array.

* Update submodule skywalking-ui

* Update submodule skywalking-ui

* Prepare beta2 changelogs.

* #1207

Return true when segment parse throw exception to avoid parse the segment over and over again which read from buffer file.

* no message

* #1202

1. Determine the log is enabled for the DEBUG level before printing message.
2. Make the columns initialize to be static attribute.
3. Topology build optimize: Cache query result to avoid repeating queries.

* #1202

Add elasticsearch batch process setting into application.yml.

* #1202

Fixed check style error.

* #1202

Use XContentFactory to build source to insert into elasticsearch.

* support shardingjdbc database storage feature

* dependency and version should be defined in collector root pom.xml

* update the markdown file

* fix errors

* fix checkstyle errors

* add the Logger modifier "static" in pr #1347

* fix the issue #1376