Added gem:clean task
Added a GemReleaseTask.
Added GemSpecTask, GemPackageTask and fixed namespaces
Added simple RSpecTask
Aliased invoke to run
Added alias and chain methods
Added Ekar.invoke and set tasks to be runnable only a certain number …
…of times, 1 by default.
Removed unnecessary Ekar::Command class and added Ekar.invoke method
Loads Ekarfile and ~/.ekarrc file.
Added descriptions and lists.
First pass at being useful.