Fix for "Inconsistent usage of lastColumnRead in SQLDroidResultSet.java" (SQLDroid issue #25).  Now getXXX(String columName) uses findColumn(String columnName) to get the JDBC style column index that is then fed into the corresponding getXXX(int index) method.
Merge pull request #28 from SQLDroid/SQDroidResultSet_Issue25

Fix for "Inconsistent usage of lastColumnRead in SQLDroidResultSet.java"...