solve #1899

* Send mails as HTML as default. Setting for send as plain text.
 * Add new option SendAsPlainText. remove EnableHTMLAlternative
 * Send HTML mails as default
 * Add html check if html2text should be performed

* Send only multipart or plain. Add deprication warning for ENABLE_HTML_ALTERNATIVE

* Still use ENABLE_HTML_ALTERNATIVE for backward compatibility

* Changed to not ignore html2text errors

Update code.gitea.io/git

* Include formatting check to the `make check` rule

... and give it its own standalone target too (make fmt-check)

Show diff on fmt-check failure
Do not allow running "fmt-check" with incompatible go version
Also simplify the `fmt` rule

* Forbid running "make fmt" with Go version != 1.7 or 1.8

* Ignore bindata.go for spelling and formatting checks

also remove duplicated variable assignment for GOFILES

* Run `make fmt`

* Center-aligned login topbar

* Center-align OpenID login

Fix misspelled variables

Run unused test

* fix: error from mktemp command in MacOS.

* [ci skip] udpate temp name.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

* Remove annoying difference in button heights.

Why was that even there?

See before & after: http://imgur.com/a/yKdUR

* (2/2) Remove annoying difference in button heights

* Fix 404 for external tracking issues

* Fix 404 for new/upload file

* Display draft releases

* Include ctx.User in user cache

* Integration test

* Display all organization from user settings

* fix Tab selection

* Update locale_en-US.ini

* Add a condition for display Create organization button

* Remove french translation

* Remove unnecessary admin flag

* Fix user profile activity feed

* gofmt, and avoid overlapping database connections

* Fix some mistakes

* Fixes

* Not correct -> incorrect or invalid

* Update according to comments

Tests indicate that line length alone does not make browsers slow, so
increase the default threshold after which diffs get surpressed for line
length from 500 to a more reasonable 5000 characters.

Fixes: https://github.com/go-gitea/gitea/issues/1826

* Fix pull request compare link

* Integration test

Signed-off-by: Shunsuke Mie <sux2mfgj@gmail.com>

Firefox users will experience a flash of unstyled content on loading
various pages, this patch will fix this issue using Filament Groups
loadCSS library to asynchronously load the CSS responsible for the FOUC.

Will fix #1698.

Signed-off-by: Sondre Nilsen <nilsen.sondre@gmail.com>

* Update code.gitea.io/git

* Update function calls

* govendor fetch

this makes calcFingerprint use SSH.KeyTestpath instead of os temp dir.

* xxx_active_code_live setting in printed in hours and minutes instead of just hours

* Update app.ini description of xxx_code_lives settings

* Replace Gogs by Gitea

* Fix missing changes

* Create Gitea webhook and put Gogs webhook apart.

More fixes for dashboard search

* Fix invalid reference in feeds template

* Comment for GetActAvatar

* Add integration test

It used to be unclear what the difference between the two are.