v0.4.2 release

[smmaurer]

This PR is a release candidate for v0.4.2.

What's included

Restored behavior from v0.3:

• support for aggregating integer values (PR #108)
• thread count and contraction hierarchy status messages (PR #109)
• raises deprecation warnings instead of errors for reserve_num_graphs() and init_pois(), so that code written for v0.3 will continue to run (PR #116)

Performance improvements:

• improves speed of network aggregations (PR #111)
• better multi-threading support on Mac (PR #109, #118)

Installation and compatibility:

• binary distributions for all platforms now available on Conda Forge
• updated Mac compilation process (PR #109, #118)
• updated installation instructions in README and Sphinx docs
• resolves some deprecation warnings from Pandas (PR #109)

To do before merging and release

• [x] Update version numbers
• [x] Update changelog
• [x] Set up Pandana in Conda Forge, including automatic builds of the binaries
• [x] Review readme and documentation to update installation instructions

[coveralls]

Coverage increased (+0.6%) to 91.667% when pulling 60197ba699e8160363de1b521fd02069e2079d2b on develop into 961a7ef8d3b0144b190cb60bbd61845fca6fb314 on master.

[coveralls]

Coverage increased (+0.6%) to 91.667% when pulling b24050da72e29080de7f00578e1ea6325d0cdf34 on develop into 961a7ef8d3b0144b190cb60bbd61845fca6fb314 on master.