New coverage check implementation. 

New report APIs to check coverage, support for coverage checks in Ant,
rework Maven check goal implementation based on new APIs.
Do not overload setters as Maven configuration will not properly work
with this.
Improve documentation on how to specify coverage ratios.
Update examples to new check options.
Fix config syntax in example.
Merge pull request #106 from jacoco/issue-106

Coverage check redesign incl. Ant support.
Context information for error messages.

Analyzer and Instrumenter now expect a resource name parameter to
provide better messages in case of internal errors.
Merge pull request #104 from jacoco/issue-104

Provide context information when exceptions happen in Analyzer or Instrumenter
Better accessibility of JaCoCo reports (GitHub #3)

Adjust saturation of red source highlighting in HTML reports to make
JaCoCo reports more accessible to red/green blind users.
Issue error when analyzing instrumented classes (GitHub #108)
Prepare release 0.6.3
Prepare for next development iteration
Support for Android Strict Mode (GitHub #113)