Merge pull request #4 from l2dy/release-md

Update RELEASE.md

RELEASE.md

@@ -11,13 +11,13 @@ v0.6.2 (2018-05-17)
 
 v0.6.3 (2018-05-21)
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-1. support `float` data_type when running in gpu
+1. support `float` `data_type` when running in GPU
 
 v0.7.0 (2018-05-18)
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 1. Change interface that report error type
-2. Improve cpu performace
-3. Merge cpu/gpu engine to on
+2. Improve CPU performance
+3. Merge CPU/GPU engine to on
 
 v0.8.0 (2018-05-31)
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