Release candidate 1 for 1.7.2

[tomschenkjr]

This version has several bug fixes:

• Resolved an error users would see when downloading the JSON file on a SoDA call, Error in rbind(deparse.level, ...) : numbers of columns of arguments do not match. (Error in rbind(deparse. level, ...) #19)
• The LIMIT argument was incorrectly interpreted by RSocrata, which sometime causes slower performance (Adding LIMIT to a url causes an infinite loop #83, RSocrata hangs when passing along SoDA queries with small number of results #14)
• The mandatory @context, @id, conformsTo, and describedBy fields were not shown when using ls.socrata(). These elements are now included as attributes in the resulting data frame. (@context and @id missing from ls.socrata() download #72)
• Fixed a bug which a user-defined token was ignored when the user passed along a $where argument in a SoDA query. (read.socrata(url, token) neglects my token #105)
• Fixes a bug where the POSIX date conversion would not occur when using the JSON SoDA url (Write a unit test for pulling data from JSON #85)
• Queries now follow SoDA guidelines and are explicitly sorted. This could have caused a silent error where some row may not have downloaded. (Add explicit sorting to query to assure results #15)

[coveralls]

Coverage decreased (-1.7%) to 96.25% when pulling bb5e4e9 on dev into fa923de on master.

[tomschenkjr]

@nicklucius and @geneorama - please take a look at the release notes in the comments on the pull request. Let me know if there is anything missing.

[nicklucius]

@tomschenkjr - the release also fixes a bug where the POSIX date conversion would not occur when using the JSON SoDA url (#85).

[tomschenkjr]

Thanks, @nicklucius - updated.

I just realized that I forgot to update the NEWS.md document, so I'll add these bullets to it and update the branch.

[coveralls]

Coverage decreased (-1.7%) to 96.25% when pulling 8f779db on dev into fa923de on master.