replace with mailflute

pom.xml

src/main/java/org/codelibs/fess/exec/Crawler.java

src/main/java/org/codelibs/fess/helper/MailHelper.java

...ain/java/org/codelibs/fess/mylasta/action/FessLabels.java

.../java/org/codelibs/fess/mylasta/direction/FessConfig.java

.../java/org/codelibs/fess/mylasta/mail/CrawlerPostcard.java

...java/org/codelibs/fess/mylasta/mail/EsStatusPostcard.java

src/main/java/org/codelibs/fess/util/ComponentUtil.java

src/main/resources/fess.xml

src/main/resources/fess_config.properties

src/main/resources/fess_env_production.properties

src/main/resources/mail/crawler.dfmail

src/main/resources/mail/es_status.dfmail

src/main/webapp/WEB-INF/mail/crawler.hbs

src/main/webapp/WEB-INF/mail/solr_status.hbs