Log Message:
Update pear-MDB2_Driver_sqlite to 1.5.0b4 and add LICENSE.

- PEAR::isError() -> MDB2::isError(), Bug #19491.
- PEAR::loadExtension() -> extension_loaded(), Bug #19583.
- Fix Bug #19262. Updates conditional stagements to use logical operators to
  include MDB2_FETCHMODE_OBJECT where appropriate. Was broken in r321197.
- Fixed createIndex not using quoteIdentifier in SQLite driver
- Have dropTable() return MDB2_OK on success, as documented (bug 19199)
- Have dropIndex() return MDB2_OK on success, as documented (bug 19198)
- Have vacuum() return MDB2_OK on success, as documented (bug 19196)
- Have createIndex() return MDB2_OK on success, as documented (bug 19195)
- Have dropConstraint() return MDB2_OK on success, as documented (bug 19194)
- Have createConstraint() return MDB2_OK on success, as documented (bug 19193)
- Have dropSequence() return MDB2_OK on success, as documented (bug 19191).
- FETCHMODE constants are NOT bitwise.
- fixed bug #18203: Type introspection breaks with associative arrays if names
  are identical (patch by Peter Bex)
- request #18316: Add TINYINT to list of coltypes in
  MDB2_Driver_Reverse_sqlite [brotherli]
- fixed bug #16275: split() is deprecated in PHP 5.3
- request #18316: Add TINYINT to list of coltypes in
  MDB2_Driver_Reverse_sqlite [brotherli]