v1.8.6-COACH

CI: Install customized project

Avoid caching problem on Travis CI.

DO NOT MERGE

v1.8.5-COACH

CI: Install customized project

Avoid caching problem on Travis CI.

DO NOT MERGE

v1.8.4-COACH

CI: Install customized project

Avoid caching problem on Travis CI.

DO NOT MERGE

v1.8.2-COACH

Bump dcurl dependency to 0.5.0

DO NOT MERGE

v1.8.1-COACH

perf: Parallelize GTTA API again

DO NOT MERGE

With new network refacotring in v1.8.0, the queue problem seems resolve.
So we roll back implementaion of parallel gTTA again.

v1.8.0-COACH

Bump RocksDB dependency to 5.18.3

DO NOT MERGE

v1.7.1-COACH

Bump RocksDB dependency to 5.18.3

DO NOT MERGE