WIVET enhancements

-Added support for html frame tags.
-Included support for inspecting code within frame tags.
-Added support for crawling meta refresh tags.
-Added a new optional specification to carry out deeper analyses.
-Fixed bug causing crawlax not to update candidates after running the
prestatcrawling plugin.
-Created a new test class that targets the wivet benchmark .

For detailed information refer to the patch files.

We used a set of frameworks to validate the results of our
improvements. WIVET is the most noticeable one, it is widely used to
test crawlers. If you run the WivetTest class, you will see if crawls
up to a 74% of the site. In the trunk version of crawljax it is only
able to crawl betwen 0% and 10% depending on the targeted node (due to
the issues fixed in our patches).
solution to issue #57 as suggested by Jelle.
Merge pull request #69 from crawljax/Issue#57-xpathformat

solution to issue #57 as suggested by Jelle.
Fixes issue #55.
Merge pull request #70 from crawljax/Issue#55

Fixes issue #55.
dependency bump.
release plugin.
preparing a new release
[maven-release-plugin] prepare release crawljax-2.1
[maven-release-plugin] prepare for next development iteration
Moving Maven info to the Wiki.
changes for the next version
Merge branch 'master' of https://github.com/crawljax/crawljax
Update CHANGELOG.md
Update CHANGELOG.md
removing the docs folder
use firefox instead of htmlunit.
cleaning up the patch
Preparing the changes for the next release.
Merge pull request #72 from crawljax/WIVET-patches

Wivet patches