Merge pull request the-events-calendar#64 from the-events-calendar/fe…

…ature/filter-by-related

Add field in the sidebar widget to filter shows by related post

Resolve PHP compatibility issues with shorthand PHP tags

jQuery fixes and update compatibility

Merge pull request the-events-calendar#50 from moderntribe/release/G2…

…0.04

Merge pull request the-events-calendar#41 from moderntribe/release/G1…

…9.03.1

Release/g19.03.1

Add ja_JA mo/po files

Update release date | M18.05

Bump min WP version | M17.16

Update readme | M17.12