Merge pull request jsforce#556 from jsforce/release-1.7.1

Release 1.7.1

Merge pull request jsforce#504 from jsforce/release-1.7.0

Release 1.7.0 (update)

add built scripts

add built scripts

change ver to 1.6.3

change ver to 1.6.2

Merge pull request jsforce#431 from jsforce/fix-npm

Change ver to 1.6.1 to fix the npm published package

Merge pull request jsforce#374 from jsforce/release-1.6.0

Release 1.6.0

Merge pull request jsforce#315 from jsforce/release-1.5.1

Release 1.5.1

Merge pull request jsforce#255 from jsforce/release-1.5.0

Release 1.5.0