Import sqlbuilder extension skeleton
Add spaces
add space to if expression
Add spaces
Spacing, indentation and brackets
Fix bootstrap script
Fix extension skeleton
MINIT function
Add single/double string quote function.
Fix .travis ci script
Merge branch 'master' of git.corneltek.com:php/SQLBuilder into devel

Conflicts:
	.travis.yml
	src/SQLBuilder/Expression.php
	tests/bootstrap.php
xstring structure
provide a basic xstring utilities
xstring functions
use xstring API to do string quote
Add xstring_set_zval_copy macro
Merge branch 'master' of github.com:c9s/php-SQLBuilder