Faster client-server transfers, fault-tolerant IO, improved error handling

Highlights:

• #880 and #870 together speed up .to_ndarray() by 20x (to 410 MiB/s) and ak.array() by 7x (to 175 MiB/s)
• #821 introduces a fault-tolerant invocation of ak.read_all()
• #857 improves the granularity and helpfulness of error messages for I/O
• #872 corrects error handling on item assignment and fixes silent failures described in #869

new version tag for versioner fix '-' replacement PR

Merge pull request #868 from glitch/867-version-string-manipulation

Closes #867: Remove dash character replacement in version stringf

makefile fix for python3 run of versioner

Merge pull request #863 from glitch/862-Makefile-versioneer

Closes #862: Explict python3 for versioneer and adding 'make version' target

new versioning started

Merge pull request #851 from glitch/508_versioneer

Issue #508: Adding versioneer to project for version management.

incorporated new additions like strings, logging, and more

Merge pull request #212 from mhmerrill/split-out-logging

Split out logging and new version number

v2019.11.12

Update VERSION

v0.0.9-2019-10-21: Merge pull request #145 from mhmerrill/pdarray-index-enhancement

Pdarray index enhancement

v0.0.9-2019-10-18: Merge pull request #143 from mhmerrill/pdarray-index-enhancement

Pdarray index enhancement

v0.0.9-2019-10-02: Merge pull request #125 from mhmerrill/set-ops-feature

Set ops feature

Benchmarks and bug fixes

Merge pull request #124 from mhmerrill/benchmarks

Benchmarks