v0.6: scheduled release

Highlights

Str\split() and Str\join() now have their argument order consistent with other HSL functions, and the temporary deprecation marker has been removed.

All Changes

• Remove Str\split_args_switched by Kunal Mehta on 2017-10-06
• Update requirements, including adding minimum HHVM version by Fred Emmott on 2017-10-05
• Revert D5987790: [hsl] Remove Str\split_args_switched by Jason Kurtz on 2017-10-05
• Remove Str\split_args_switched by Kunal Mehta on 2017-10-05
• Str{split_args_switched -> split} by Kunal Mehta on 2017-10-05
• Swap Str{join, split} arguments by Kunal Mehta on 2017-10-05
• Adding edge-case in Vec\range documentation by Martin Fixman on 2017-10-05
• Remove apt-get commands from travis.sh by Fred Emmott on 2017-10-04
• Use Str\join_args_switched in generate-docs by Kunal Mehta on 2017-09-29
• TEMPORARY: Deprecate Str\join by Kunal Mehta on 2017-09-29
• Remove Dict\slice by Kunal Mehta on 2017-09-29