fix (regression tests): make datastore queries strongly consistent

The previous tests were flaky because based on eventually consistent queries.
The new tests use only ancestor queries, that are strongly consistent.
Merge pull request #267 from silvolu/fix-datastore-regression

fix (regression tests): make datastore queries strongly consistent
Fix Copyright example in COPYING
use actual transaction id-like value - fixes #268
fix(build): allow git add to fail if there aren't new docs
Merge pull request #269 from silvolu/fix-docs-build

fix(build): allow git add to fail if there aren't new docs
fix(build): execute git commit only if there have been changes
bigquery: hello, world
Merge pull request #264 from stephenplusplus/spp--bigquery

BigQuery
test(bigquery): fixed typo in test case name
0.10.0
Merge pull request #273 from silvolu/fix-docs-build

fix(build): execute git commit only if there have been changes