update progress.md

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chai2010 2016-01-13 16:46:43 +08:00
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- [x] 8.9 Cancellation
- [x] 8.10 Example: Chat Server
- [x] Chapter 9: Concurrency with Shared Variables
- [ ] 9.1 Race Conditions
- [x] 9.1 Race Conditions
- [ ] 9.2 Mutual Exclusion: sync.Mutex
- [x] 9.3 Read/Write Mutexes: sync.RWMutex
- [x] 9.4 Memory Synchronization