Fixes issue 9:
https://github.com/sparkapi/sparkapi4p2/issues/9

Bug: SparkAPI_Core::parse_cache_time($val)
HTTP method helpers, providing easier accessibility to all API services
lacking a helper method.
Support for leading and trailing "/" (well, we strip it, but you don't
have to know that).  Removed some commented out print_r statements.
Let's start actually writing tests, too.
Merge pull request #12 from joshcom/spark_9

Fixes issue 9:
Update lib/Core.php
Merge pull request #17 from donclem/master

This is in Reference to Issue #16
Merge pull request #14 from thinkerytim/master

Closes Issue #4 - Merging as testing is complete!
Merge pull request #15 from joshcom/restify

HTTP method helpers
Update lib/MySQLiCache.php

fixed typo in unix_timestamp() and set rand interval lower so it deletes more frequently.
Change code comments incorrectly documenting API for semantic HTTP
methods.
Merge pull request #19 from joshcom/master

Minor comment change to correctly document http methods
Removed developers domain
Merge pull request #20 from joshcom/master

Removed developers domain
Sparkbar helper method, minor refactoring of error attribute handling.
Small bugfix for a typo in the OAuth class.
Added a phpunit.xml to handle the test bootstrapping, so that the tests won't need the extra includes
Added Composer support
Merge pull request #21 from joshcom/master

SparkBar helper method
Merge pull request #18 from thinkerytim/patch-1

Update lib/MySQLiCache.php