Merge pull request Chicago#150 from Chicago/hotfix1.7.4

Hotfix1.7.4

Merge pull request Chicago#142 from Chicago/issue141

Hot patch to fix Chicago#141

Release Candidate 1 for 1.7.2 (Chicago#138)

* Added unit tests for issue Chicago#118

* Add unit test for Chicago#120

* Bug fix - fixes Chicago#120

* Update version number

* Fixes Chicago#124 (Chicago#125)

* Added testing for issue Chicago#121 -- will fail

* Changed to camel case to accomodate future variable renaming

* Added handling of ISO 8601 timestamps without fractional seconds. See issue Chicago#121

* Increased minimum version of R because of `anyNA` function.

* Unformatted dates kept as chr; added warning; added tests

* Added tests for Chicago#124 -- will fail

* Handles downloadURL from ls.socrata. Fixes Chicago#124

* Closes Chicago#129

* Iteration version

* startsWith() requires R >= 3.3.0

* Resolves Chicago#133. Also documents per Chicago#132

* Updated to reflect consequence of Chicago#133

* resolved merge conflict from rebasing

* fixing test - dataset is live so rows can increase, and fixed data types.

* add unit test for issue Chicago#118 - will fail

* fixes Chicago#118

* Add .gitattributes, ignores it during R build. Closes Chicago#135

* Fixes Chicago#134

* Clarified language on installing from GitHub

* Removed penultimate release from build testing. Closes Chicago#136

* Updated formatting for sections

* Update NEWS.md for 1.7.2 release.

* Included remaining changes to NEWS

Merge pull request Chicago#116 from Chicago/dev

Release candidate 1 for 1.7.2

Merge pull request Chicago#87 from Chicago/dev

Promoting stable version of 1.7.2 to master

R 3.2.1 wants all URLs in canonical form--has been changed

R 3.2.1 wants all URLs in canonical form--has been changed

Revised quotations per CRAN feedback

Updated copyright year

remove pdf from Rbuildignore