GitLab

* Replace all v1.7 with v1.8

* Add v1.8 release note

* Change PAI into OpenPAI

* Update Release.md

* Refine relase note

* Update date of release
Co-authored-by: QuanluZhang <z.quanluzhang@gmail.com>

* Improve docs

* All using # to start

* uploaded -> excluded

* Set versionCheck default to true

* Add .nniignore example

* Rename training service docs

* Update training service docs

* Fix step numbering

* Resolve comments

* Fix typo

* Resolve comments

* Fix broken link

* fix link

* sync release version
Co-authored-by: Lijiao <15910218274@163.com>

* create Dev homepage (#2101)

create dev homepage for lijiao

* Doc homepage (#2102)

update index

* update (#2413)
Co-authored-by: Lijiao <15910218274@163.com>

* Final doc (#2436)

* change font-family Segoe

* update
Co-authored-by: Lijiao <15910218274@163.com>

* chang font-family (#2438)

"Lato", segoe ui, "proxima-nova","Helvetica Neue",Arial,sans-serif

* update index.html (#2441)

* change font-family Segoe

* update
Co-authored-by: Lijiao <15910218274@163.com>

* change font-family Segoe (#2453)
Co-authored-by: Lijiao <15910218274@163.com>

* Update layout.html (#2469)

* change font-family Segoe (#2478)
Co-authored-by: Lijiao <15910218274@163.com>

* Update index.html (#2482)

* add chinese doc link (#2512)

* add chinese doc link

* update
Co-authored-by: Lijiao <15910218274@163.com>

* change link (#2519)
Co-authored-by: Lijiao <15910218274@163.com>

* update release version

* update wechat group QRcode

* update wechat image (#2533)

* update wechat image

* update link
Co-authored-by: Lijiao <15910218274@163.com>

* fix broken link (#2542)
Co-authored-by: Lijiao <15910218274@163.com>
Co-authored-by: Lijiaoa <61399850+Lijiaoa@users.noreply.github.com>
Co-authored-by: Lijiao <15910218274@163.com>

update wechat group qr code

* Update README.md

* Update README.md

* Update README.md
Co-authored-by: Scarlett Li <39592018+scarlett2018@users.noreply.github.com>

v1.5 release note

fix typo

* update readme

* move doc of model speedup

* add quick start for nas & compression

* refine efficientnet

* pai -> openpai

* fix interval

* update batch size

* move readme to trial examples

* update to docs

* Update FAQ.md and README.md with FAQ links.

Refactor README.md

* Update README.md -- update the tuners part of the overview table.