Update INSTALL.md
Merge pull request #848 from superdesk/devel

Devel
LB-1945 Set default number of items on SEO to 20
LB-1961 Show error after refresh
Merge pull request #852 from vladnicoara/seo-error

LB-1961 Show error after refresh
Merge pull request #851 from vladnicoara/master

LB-1945 Set default number of items on SEO to 20
Merge pull request #854 from superdesk/devel

Devel update for bugs list
Merge pull request #855 from superdesk/master

Maste update.