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