[FIX] BTREE_MIN_INT negative value
Merge pull request #39 from arescope/fix-min-negative-value

[FIX] BTREE_MIN_INT negative value
[FIX] Evaluation form clone

- Closes #1386
[FIX] Do not show contact info section for contributions

 * Only categories and conferences
[FIX] Bypass authentication for EA signing

 * People should not need to have access to the event;
[FIX] Bypass authentication for EA signing

 * People should not need to have access to the event;

Conflicts:
	indico/MaKaC/plugins/Collaboration/handlers.py
[FIX] PEP8 issues
Merge branch 'v1.1'

Conflicts:
	indico/MaKaC/plugins/Collaboration/handlers.py