Description:
------------
In SQLite3, method busyTimeout() is missing, and by default there is no busy 
handler.

In old SQLite extension, a default timeout of 60 seconds was set, and a 
busyTimeout() method was available to define the timeout.

I recently started with SQLite3 to have this kind of errors as load was growing 
on SELECT statement:

Warning: SQLite3Stmt::execute(): Unable to execute statement: database is locked

Some internet research showed that this could be fixed by setting a different 
busy timeout, and I noticed PHP wasn't setting any on SQLite3.

While I'm unsure about setting a default busyTimeout on SQLite3 (it currently 
have none, but PHP_5_3 is still young enough to change this kind of behaviour) 
it should be at least possible to set one.

Patch to add a SQLite3::busyTimeout() method (same behaviour as old 
SQLite::busyTimeout() method, with the exception this one has a true/false 
return value, while sqlite3_busy_timeout will always return SQLITE_OK, it may 
change in the future).

The patch:

https://ookoo.org/svn/snip/php_5_3-sqlite3-busytimeout-method.patch