* update: the period to a comma

* Update Concept.md

* Update Concept.md

[ISSUE #1147]Broker will report Exception if open the aclEnable and enableDLegerCommitLog flag at the same time. (#1149)

* [issue#1078]fix User can't use mqadmin command normally if they don't copy the tool.yml file to their related fold and AclEnable flag is closed.

* [issue#1147]Broker will report Exception if open the aclEnable and enableDLegerCommitLog flag at the same time.

* [issue#1147]Broker will report Exception if open the aclEnable and enableDLegerCommitLog flag at the same time.

* [issue#1147]Add the restriction of Acl in the acl's user guide.

* [issue#1147]Adjust some codes for acl issue that users can't open the aclEnable and use Master/Slave or Dledger the same time.

* [issue#1147]Adjust and optimize some codes for acl issue that users can't open the aclEnable and use Master/Slave or Dledger the same time.

* [issue#1147]return back for original codes for acl issue that users can't open the aclEnable and use Master/Slave or Dledger the same time.

Modified the format of README.md

Modified the format of deploy_guide.md

Modified the format of quick_start.md

Modified the format of  RocketMQ_Example.md

Modified the format of architecture.md

Modified the format of features.md

modify the format of concept.md

* Modify the article layout format

* Update Design_Store.md

[RIP-9] Add the system configuration option doc: Direct ByteBuffer memory size

[RIP-9] Add doc of best practice for broker 

[RIP-77]Modify the last paragraph and rid of punctuation between each section number and title