Release Candidate 1 for 1.7.2

[nicklucius]

Version 1.7.2 has several changes:

Performance improvements:

• By default, 1000 rows at a time were being retreived for each API call while paging through data. Increased to retreive 50,000 rows for each API call. (Increase Paging Capacity #129)

Bug fixes:

• Fixed a bug which caused an error if a select=count() statement was present in a URL. (error while using count() function? #120)
• Fixed a bug when data types are not found because there are no X-SODA2-* headers available in the API response. Users will now get a warning and data will be returned as character. (read.socrata() fails on some datasets due to missing response headers from server #118)
• Fixed a bug which did not recognize URLs listed from ls.socrata() as valid URLs to be used in read.socrata(). Users will now be able to use URLs from the former function in the latter function. (read.socrata() returns downloadURL from ls.socrata() as invalid SoDA URL #124)
• Removed unit tests for older releases of R. (Remove oldrel from Travis CI build matrix #136)

Deprecation:

RSocrata's core development team has stated a formal policy to only support the most recent release of R. Until now, RSocrata was tested against the penultimate release of R; however, testing will be limited to the current version of R and the current development release. The project's contributing guidelines have been updated to reflect that accepted changes to RSocrata must pass tests on the current and penulimate versions of R.

While RSocrata is only tested on the current and penultimate version, the core development team expects it will work on older versions most of the time. See #132 for more information.

[coveralls]

Coverage decreased (-0.07%) to 96.341% when pulling e28d51c on dev into dfa7001 on master.