inline_entity_form 8.x-1.0-beta1

Changes since 8.x-1.0-alpha6:

• #2819971 by benjy: Move inline_entity_form_has_tabledrag to the handler
• #2569193 by dawehner, tedbow, yce, Peter Haight, zviryatko: The simple widget doesn't support bundle-less entities
• #2811013 by smk-ka: Widget form doesn't display admin-entered help text
• #2800115 by dawehner: inline_entity_form_entity_type_build overrides custom inline_form classes
• #2801057 by trobey: Include project namespace for module dependencies
• Replace translatability 'cue' with 'clue' (typo)
• #2737259 by i_g_wright: Invalid placeholder (!name) in string: !name field is required
• #2494959 by agoradesign, mikgreen, bojanz, idflood, tedbow, reekris, miro_dietiker, slashrsm, Berdir: Add translation integration
• #2730759: Clean up InlineEntityFormComplex::extractFormValues()
• Clarify language parameter naming (refer to the language id as the langcode).
• Remove remaining array() usage.
• Fix the travis build by using the dev-master version of drupal_ti.
• #2711527 by yce: Unfieldable entities' values are not cleaned up