Adding sparks placeholder directory
This is actually a pretty big deal..
Removing debug lines that I left on seejohnrun's mac
Tweaks to how spark bootstrap is handled
Style fixes
Adding SPARKPATH to idnex.php, changing SPARK_PATH refs in spark code
Integrated spark loader functionality
Removing debugging lines
Renaming blank index.php to index.html
Sparks always installed inside of APPPATH
SPARK_PATH -> SPARKPATH for consistency
Move the sources configuration into APPPATH/config
Merge branch 'feature/sparks' of github.com:EllisLab/CodeIgniter into feature/sparks

Conflicts:
	index.php
	system/spark/spark_cli.php
	system/spark/spark_type.php
Some whitespace cleanup
Move installer out and use config
Added config options for spark sources
Also allow "--spark" as switch
ADded basic sparks documentation
Remove upgrade_system, as it doesn't make sense anymore
Merge branch 'feature/sparks' of github.com:EllisLab/CodeIgniter into feature/sparks