Don't say sudo ./inbox in README.
Don't say sudo ./inbox in README.

Test Plan: Ran commands as user.

Reviewers: mg

Reviewed By: mg

Differential Revision: https://review.inboxapp.com/D27

nylas/sync-engine,wakermahmud/sync-engine,nylas/sync-engine,closeio/nylas,gale320/sync-engine,nylas/sync-engine,wakermahmud/sync-engine,ErinCall/sync-engine,ErinCall/sync-engine,closeio/nylas,EthanBlackburn/sync-engine,rmasters/inbox,PriviPK/privipk-sync-engine,PriviPK/privipk-sync-engine,Eagles2F/sync-engine,jobscore/sync-engine,rmasters/inbox,gale320/sync-engine,EthanBlackburn/sync-engine,PriviPK/privipk-sync-engine,rmasters/inbox,closeio/nylas,rmasters/inbox,jobscore/sync-engine,Eagles2F/sync-engine,ErinCall/sync-engine,PriviPK/privipk-sync-engine,wakermahmud/sync-engine,gale320/sync-engine,jobscore/sync-engine,EthanBlackburn/sync-engine,Eagles2F/sync-engine,ErinCall/sync-engine,wakermahmud/sync-engine,gale320/sync-engine,PriviPK/privipk-sync-engine,jobscore/sync-engine,nylas/sync-engine,Eagles2F/sync-engine,EthanBlackburn/sync-engine,closeio/nylas,gale320/sync-engine,ErinCall/sync-engine,wakermahmud/sync-engine,EthanBlackburn/sync-engine,Eagles2F/sync-engine