fix invalid user links in admin panels
Fix #643
custom avatar upload
fix #139
more on change avatar
fix #644
Fix 653
Fix #652
Fix #656
Merge pull request #657 from chai2010/dev

Fix #656
add milestone page design
fix #660
Merge branch 'dev' of github.com:gogits/gogs into dev
update milestone page design
Fix #543
fix #659
fix #664
Added comments documenting how to export SSL keys from .pfx
Merge pull request #674 from jcracknell/pfx-export

Added comments documenting how to export SSL keys from .pfx
fix #675