add csv field type detection code

Add a simple field type detection code for CSV plugin.
The first data line is used to detect (Number, Float, String) data type.
Update ESRI FileGDB to 1.10 version that supports DeleteField operation

The code is updated from gdal-1.10 code repository.
Also update the customized GNUmakefile
Add DeleteField() operation for MySQL plugin

Add DeleteField() operation.
Add #include support for latest mysql version.
Append newly added file for FileGDB plugin

This file is missed from last ci.
Fix performance issue when export data to Oracle

Set OCI Prefetch count to 2000, which lead a larger buffer for better
performance.