[add] test page for event taxonomies

content/post/event1.md

++++
+title =  "終わったConference"
+date = 2019-07-22T15:46:48+09:00
+categories = ["event"]
+tags = ["Conference"]
+image = ""
+draft = true
+mkbanner = ["true","false"]
++++
+
+終わったConferenceです
+

content/post/event2.md

++++
+title =  "これからのSeminar"
+date = 2019-08-23T15:46:53+09:00
+tags = ["Seminar"]
+categories = ["event"]
+image = ""
+draft = true
+mkbanner = ["true","false"]
++++
+
+これからあるSeminarです
+

content/post/event3.md

++++
+title =  "Open campus"
+date = 2019-08-04T15:47:26+09:00
+categories = ["event"]
+tags = ["opencanpus"]
+image = ""
+draft = true
+mkbanner = ["true","false"]
++++
+
+Open campus@本郷
+

content/post/event4.md

++++
+title =  "これからのconference"
+date = 2020-07-23T15:47:28+09:00
+categories = ["event"]
+tags = ["Conference"]
+image = ""
+draft = true
+mkbanner = ["true","false"]
++++
+
+2020年に開催します
+

content/post/event5.md

++++
+title =  "一般公開@理研"
+date = 2019-04-23T15:47:32+09:00
+tags = ["opencampus"]
+categories = ["event"]
+image = ""
+draft = true
+mkbanner = ["true","false"]
++++
+
+理研で一般公開をしました