FindBugs: more correct fix for default enabled detectors & categories.

This commit reverts previous fixes in commits b7515297 & 4dff88f2 and 
make corrections in one line: replace defaut preferences creation from FindBugsPreferenceInitializer  to UserPreferences.

FindBugsPreferenceInitializer performs UserPreferences creation  and 
apply _eclipse_ defaults.
Add support for includeResources and includeTestResources
Update m2e to support m2e 1.5
Ignore resources that have includes/excludes
Merge pull request #43 from ArloL/resource-includes-support

Add support for includeResources and includeTestResources
Correctly replace **/ with .* instead of .*/
Replace duplicate .* in the created regular expression
Merge pull request #44 from rtack/support_m2e_1.5

Update m2e to support m2e 1.5
Update maven-checkstyle-plugin to 2.12
Consistently format maven poms
Run Cleanup on checkstyle
Use similar cleanup as used in the maven checkstyle plugin
Remove duplicate file separators
Add travis configuration
Update tycho to 0.20.0
Specify environments as recommended
Add findbugs check goal to lifecycle mapping
Add a prerequisite for maven 3.0
Update maven assembly plugin to 2.4
Update maven resurces plugin to 2.6