version++
new method sql()
add default SQL test in sql() method
sql -> sql()
fix typo in test name
sql can omittable when table class and SQL in datasection is defined
pod fixes
version++
Merge branch 'method_alias' into method_alias2

Conflicts:
	Changes
	lib/Kappa.pm
sql is omittable when table class is used and SQL is written in __DATA__ section
modify SQL indent for readability
sql can be omitted in table class and SQL is defined in __DATA__ section
move sql method position
move sql method position
sql can be omittable in execute_query_named when table class is used and SQL is defined in __DATA__ section
update READMEs
update Changes
require SQL::Executor 0.16 for customized error handling
add testcode for customized error handling
write POD