Display the percent of the total request any symbol took.
Put percent of total in same cell as function.

Having them in the same row/cells makes reading the results a bit
easier, as the rows highlight at the same time.
Show percent of request for parent function as well.

It can be useful for finding functions that have a high self cost.
Update tests for nbsp.
Merge pull request #103 from perftools/symbol-percentage

Display function percentage of total in symbol view
Fix image path in custom/create to use URL generation helpers.

Fixes #105
Add how to profile CLI scripts to README.
Rename 'head' to 'new' as I think it is clearer.

* After not using xhgui for a while I was totally confused by base/head.
  Using new made understanding it simpler.
* Update the links in the list to the 'new' side of the comparison as
  that is generally more useful.
* Add reminder text to the diff to help reduce confusion.
Add note about missing watch functions.
Rename Exclusive to Self.

I've always found exclusive to be a bit confusing of a term. I find self
is a much simpler term that also shows up on other profiling tools both
in browser and in places like xdebug/KCachegrind.
Add a very basic/simple client side search through functions.

It isn't elegant or super fast, but it works.

Refs #64
Merge pull request #109 from perftools/rename-exclusive

Rename exclusive to self
Merge pull request #110 from perftools/client-side-filter

Add a very basic/simple client side search through functions.
for PHP 5.5, don't try to profile the builtins
Merge pull request #113 from lornajane/php55

for PHP 5.5, don't try to profile the builtins
Update header.php

added save.handler check for non mongo extension feature with file handler
Update header.php
Update File.php

added cache for data files
Update config.default.php

added example for save.handler.file and save.handler.filename
Update FileTest.php

modified test to work again with the real cache folder