add more powerful find/replace commands to migration from FestAssert

add find/replace command for FestAssert code to AssertJ core migration
add find/replace command for renamed assertions from FestAssert
add find/replace commmand for FestAssert Joda-Time to AssertJ Joda-time migration
Merge pull request #5 from lesaint/gh-pages

add more powerful find/replace commands to migration from FestAssert