a new build-state-map helper function, which returns {:component-id current-component-state} map.

The state of new component is set to *stopped-component-state* value (default is EmptyState).

feature toggling. now component may have new status :disabled. During the system start any disabled components will be ignored (start/stop functions will not run). To disable a component just add to components' config map a key :context/component-disabled and true as a value.

EmptyState. During the system stop, any stopped component now has state value as EmptyState class. This prevents poorly understood NPE if someone calls methods on the stopped component.

helper functions: config-value, state-value. state-value is aware of clojure.lang.IDeref, so it is possible to use async value (future, promise) returned from start-fn.

if config is a function, then under some circumstances it is not evaluated during component start. this bug appears only if context atom is passed as a parameter inside component during the start.

minor doc updates.

some tests now use set #{} as start-deps collection.

cyclic dependency detection between components.

flag *ignore-cyclic-deps?* to control cyclic dependency behaviour.

flag *print-exceptions?* to print exception info to stdout during the start/stop operations with components.

doc string to stopped? fn

README.adoc (orthographic and grammatical)

tests: avoid text content dependence.

(BREAKING) build-context now has two parameters. Now atom is passed as a parameter and not created inside a function.

git branching. now git flow model is used.

Init alpha release