Ignore IDEA specific files/folders
Issue #8: added a separate branch for playing with Gradle

Gradle seems to be a trending build tool, therefore, we should at least
investigate it, just to look cooler.
Findings so far:
	- you have to install Gradle yourself on your development environment
	- you also have to install additional Eclipse plugins (Groovy, then Gradle from http://dist.springsource.com/release/TOOLS/gradle)
	- even afterwards, you'll need to configure your your project to have Gradle characteristics and DSL support
	- and even afterwards, you basically get nothing (code completion works only in a limited way)

See the following reources for further information:
	- http://www.gradle.org/docs/current/userguide/ide_support.html
	- http://www.gradle.org/docs/current/userguide/userguide.html

For now, it seems to be a heavier burden than what it helps.
Issue #8: committing not added files in the previous revision
Ignore IDEA related files/settings
Added Gradle build source folder and semantic versioning support
GhostWriter bootstrapping task and removal of Maven
Fix for rebase conflict resolving