Fix unsigned columns in MySql

Unsigned column properties were never set. In consequence all migrations diff were trying to change the column definition when it was already changed.

Fixed a typo in a method name

improved exception messages when driver error occurs

Fixes error with ORA-03131 in oracle stored procedures

Used the placeholder in the command help for the name

Fixing breaking test provoke by #172

Fixed typos

Fix DebugStack->stopQuery to prevent unnecessary timings when disabled.

[DDC-1657] Prevent autoincrement sequences from creating DROP SEQUENCE statements because of old/new schema missmatch.

previous changes in bindparam function

bindParam function expects length parameter for oci_bind_by_name oci8

This reverts commit 17a265d9.

driver function

SQL Server doModifyLimitQuery() quoting of doctrine_rownum causes error

interface compatibility

Getters for AbstractAsset$_quoted and ForeignKeyConstraint$_options