This commit combines three patches to the ASTMatchers.

One adds matchers for the various parts of a for loop (initializer, condition,
increment), as well as extending the hasBody matcher to work for while and
do-while loops. The second patch adds an isInteger matcher for types.
The third patch fixes a bug in allOf, where a few of the name chages
(AllOf --> allOf) had been missed.

All matchers come with unit tests.

Patches by Sam Panzer!

llvm-svn: 160115