Move schemas from helper to db, make db in-memory
Receiver with handler as a property
Parsers become functions
Update ui, fix refresh colors
Json and plain get in rest client, update runnables for this, fix id column in ConceptStatusesRunnable
Enum Schema
SchemaListener, encapsulate _id column in db helper and set concepts in db
ExceptionReceiver
Temporary change stars to background colors
Set "watched" flag in concepts runnable while saving in db
ExceptionReceiver was bad idea - removed
Simplify db helper and classes in db package
Simplify runnables
New MainActivity, RunnablesChains
1) Fix cursor in ConceptStatusesRunnable, in older sdks cursor isn't closeable.

2) ConceptView has background which depends on Status.

3) Remove Status for unwatched concept
Rework OverviewEngine. It becomes a container for OverviewConceptsEngines