Default copyright header fixed.

This commit changes dates from 2012-2013 to 2012-2014
in default file header.
Old performance tests removed.

This commit removes two projects:
* PerformanceTests
* ResultBrowser
from MigrantWithTests solution.
New performance tester.

This commit adds new project to MigrantWithTests solution
with console application used to measure Migrant's performance.
Package reference changed to the project reference.
Performance tests: removed support for reflection.
Performance tests: modification regarding number of objects.
Some improvements in PerformanceTester.

Run specific number of warm up rounds and then use last n rounds until standard
deviation is below desired level.

Try many rounds until deviation is fine.
Also print the round number.
Added option to output performance test results in the CSV format.
Changed MigrantGenerated to just Migrant.

It makes most sense since we don't do performance tests on the reflection
version anyway.
Also write the test type.
Useful script to test performance on a group of revisions.
Added using necessary to follow commits where PerformanceTester wasn't there.
Merge branch 'issue47'.