* All files committed in docs

* Update README.md

*  update nQGL

* fix typos in FindGPERF.cmake

*  fix typo in FindReadline.cmake

* fix table

*  fix table

* update readme 5.14.2019

* readme add slack link

* Remove space keyword in UseSpaceSentence && update get-started.md

* Update nGQL.md

* support show tags and edges

* support remove tag and edge

* address dangleptr's comments

* support edge in meta service

* support leader

* fix toString function defect

* address dangleptr's comments

* address dutor's comments

* Support IP:Port semantically

* Address @dangleptr's comments

* Fixed stupid compiling error

* add AlterEdgeProcessor, GetEdgeProcessor, RemoveEdgeProcessor

* address dangleptr's comment

* rebase master
modify SET to CHANGE

* fix UT

* Refactor the insertion syntax

* Fixed missing overwritable in vertex insertion

* Support some user sentences in Query Engine

* Support some user sentences in Query Engine

* Address comments

* Address comments

* 1.Improved logic of MissingOkClause. 2.Address comments

* Improve qualify member functions should return const value

* Address comments.

* Iplement alter tag executor and meta client

* Address comments.

* SchemaManager and StorageClient share one MetaClient instance

* address dangleptr's comment

* address dangleptr's comment

* address dangleptr's comment

* fix print

* 1. Rename Define schema to Create schema
2. Implements the processing of creating and retrieving schemas from graphd to metad

* Perfect unit testing
address steppenwolfyuetong's comment

* address dangleptr's comment

* Perfect unit testing

* fix nebula_native_client build failed

* fix nebula_native_client build failed

* fix nebula_native_client build failed

* address sherman-the-tank's comment

* address dangleptr's comment
address steppenwolfyuetong's comment

* Rename addTag to createTag
rebase master

* Uniform schema version

* fix alignment

* Added YieldExecutor

* Fixed typo

* Address @steppenwolfyuetong's comments

* Rebase and address @sherman-the-tank's comments

* Fixed stupid bugs

* Implement tag alter for serverBasedSchemaManager

* Added new status MetaNotExisted

* rebased

* Changed version from millisecond to Microsecond. And unified int64.MAX

* Fixed testcase. make sure get latest TagItem from unordered vector

* Changed alterTag logic

* Address comments.

* Implement show spaces via meta client

* address dangleptr's comments

* address dutor's comments

* address dangleptr's and dutor's comments

* support go client

* fix packag path and support timeout's defaule argument

* meta server general KV storage

* enhance meta kv storage

* address dangleptr's comment

close #200 

* Refactor schemaManager to support ServerBasedSchemaManager

* Rebase on master

* Changed the metric unit of latency from ms to us

* Rebase and address @dangleptr's comment

* [WIP] Implement GoExecutor

* Address @laura.ding 's comments

* Addressed @dangleptr's comments

* Addressed @zlcook's comment

* Addressed @sherman-the-tank's and @dangleptr's comments

* Fixed a stupid error

* Reverted changes on ThriftClientManager

* Addressed @sherman-the-tank's comments

close #176  
close #177 

* add spec file to build rpm

* Address sherman-the-tank's comments

* Fix compilation failure

* Address steppenwolfyuetong's comments