Version 2.2.2

This is a largish bugfix release and should be entirely backwards-compatible with 2.2.1 and below.

• PR 604 SVG image update, thanks @jbender
• PR 608 Updates to RubyMotion 3.3, thanks @squidpunch
• PR 611 Update reference to TRAVIS env value, thanks @squidpunch
• PR 610 Call setup on cell only on creation, thanks @squidpunch
• PR 609 Updates Contributing instructions, thanks @squidpunch
• PR 605 The logger shouldn't complain when setting a modal transition style on a screen, thanks @markrickert
• PR 614 Updated readme with link to Apps list and instruction to tweet Jamon, thanks @kevinvangelder
• PR 615 As per apple docs, setFinishedSelectedImage:withFinishedUnselectedImage: is deprecated as of 7.0, thanks @markrickert
• PR 620 Unitize functional screen specs, thanks @ryanlntn
• PR 628 Adds delegate to set height of search results, thanks @squidpunch
• PR 630 Updates to RubyMotion 3.6, thanks @squidpunch
• PR 633 Warn on private on_return method , thanks @jamonholmgren
• PR 645 Remove accessory view from original cell when searching, thanks @MarkVillacampa and @jamonholmgren
• PR 648 fixed issue where on_init wasn't called until after screen_setup, thanks @kevinvangelder
• PR 659 Added a note to specify self as the receiver for PM::Screen#title=, thanks @austinseraphin
• PR 638 Bugfix for issue #621, thanks @jamonholmgren

Many thanks to the 7+ different contributors who worked on these bugfixes! Version 2.3 is coming soon.