Merge pull request #6 from nmushegian/nikolai

GUI updates 0.4.13
Merge pull request #7 from nmushegian/nikolai

0.4.13 gui update
Merge pull request #8 from nmushegian/nikolai

cancel order fix
Merge branch 'develop' of https://github.com/BitShares/web_wallet into HEAD
try to fix cover orders
fix short price restriction
remove liscence agreement from non-DSL repo