replace tabs with 4 spaces
Merge pull request #23 from jrobeson/fix-mixed-indent-and-trailing-spaces

replace tabs with 4 spaces
Initial PDO implementation. Still lacks LOB support, and suspected tons of bugs.
Proper use of the ext_pdo implementation of query rewrite mechanism, should fix a couple of small bugs with prepared statements in emulated mode and also usage of cursors (which still needs alot of tests)
Get PDO support compiling
use empty_string() instead of empty_string

empty_string is no longer a constant, but is now a function
Fix up indentation