* Make URL scheme unambiguous
Redirect old routes to new routes
* Fix redirects to new URL scheme, and update template
* Fix branches/_new endpoints, and update integration test
* Sync releases table with tags on push and for mirrors
* Code style fixes
* Fix api to return only releases
* Optimize release creation and update
Minimize posibility of race conditions
* Fix release lower tag name updating
* handle tag reference update by addionally comparing commit id
* Moved attachaments POST url from /issues/attachments to /attachments
* Implemented attachment upload on release page
* Implemented downloading attachments on the release page
* Added zip and gzip files to default allowed attachments
* Implemented uploading attachments on edit release
* Renamed UploadIssueAttachment to UploadAttachment
This commit improves templates readability, since all of them use consistent
indent with all template command blocks indented too.
1. Indents both HTML containers such as <div>, <p> and Go HTML template blocks
such as {{if}} {{with}}
2. Cleans all trailing white-space
3. Adds trailing last line-break to each file
