adding appjs theo

.../main/java/info/kwarc/sally/comm/select/Onsallyframe.java

.../main/java/info/kwarc/sally/comm/select/package-info.java

core/src/main/resources/core.xsd

core/src/main/resources/select.xsd

.../java/info/kwarc/sally4/docmanager/impl/SallyDocImpl.java

pom.xml

theo/.gitignore

theo/app.coffee

theo/app.js

theo/content/index.html

theo/npm.sh

theo/sally_client.coffee

theo/sally_client.js

theo/start.sh

...info/kwarc/sally4/processors/EnrichMessageProperties.java