( -> ( ) -> )

updated subtrees

renamed chapters

GitHub Workflows Actions

Linux Only GitHub Workflows Actions for CI

https://github.com/kangwonlee/workflows.git + linux only

c = a + b, b += a asm

resolved python 3.7.4 linux h265db76_0

nightly python back to >=3.7.3

Merge branch 'release/19081401'

updates

build utils/ and tests/ at the top level
enabled Travis CI cache
updated links

updates

parallel tests
text updates

test_ipynb -> test_ipynb_pycpp

Added comments, build_util, and tests