Allow the user to limit point locator searches to subsets of the mesh.

We have an application where a requested point lives on the interface between subdomains, and it is desirable to restrict which subdomain the returned element belongs to. This commit implements this feature, with backwards compatibility through the API using default function arguments.
Merge pull request #365 from libMesh/restricted_point_locator

Allow the user to limit point locator searches to subsets of the mesh.
Update statistics for Aug/Sep 2014.

Comment out files in libmesh_all.m that are no longer being updated.
Updating line plots.
Update publication website.
Add fparser_parse app

This is meant to be useful for debugging problems with fparser
strings, and right now it seems useful for debugging problems with
fparser...
Re-run bootstrap
Fix "screwy" braces in JIT output.
Merge pull request #367 from dschwen/jitbug

Fix "screwy" braces in JIT output.
Adding lib/sha1.cpp to the util_tree_grammar_parser_SOURCES variable.
Ran bootstrap.
fix wrong jit source for atan2
Merge pull request #369 from dschwen/jitbug2

Fix wrong jit source for atan2
Fix range estimation bug in FPOptimizer
Prevent information being optimized away in FParser
Added interpolation points mesh getter in RBEIMEvaluation
Merge pull request #368 from dschwen/fpo_expbug

Prevent information being optimized away in FParser
Merge pull request #370 from dschwen/fpobug366

Fix range estimation bug in FPOptimizer
Merge pull request #371 from danac/master

Interpolation points mesh getter in RBEIMEvaluation
Delete trailing whitespace from source.