Merge branch 'release/1.7.3' into develop
Fixed #188 TypeBinder for scala.BigDecimal is absent
Fixed optional BigDecimal NPE, added java.util.Calendar support refs
Refactored thanks to @gakuzzzz

https://github.com/scalikejdbc/scalikejdbc/commit/3d617af821900e228bb4a8aadcdde561bc6ec1cc#commitcomment-5008905
Fixed #189 Add ReadOnlyAutoSession
Fixed confusing code though it's unused flag (thanks to @xuwei-k)

see also:
https://github.com/scalikejdbc/scalikejdbc/commit/fadf03713dd46c6f82ff4385f97634e10e276192#commitcomment-5013809
Fixed parameter ordering
Merge pull request #192 from Arakaki/develop

Fixed parameter ordering
Fixed #193 [scalikejdbc-users-group:132] schema setting is ignored only in select queries
Fixed to use non-public schema when retrieving metadata for column names
Fixed an error "type mismatch;  found   : org.joda.time.LocalTime  required: org.joda.time.LocalDate"  in generated Specs2 files
Merge pull request #194 from kalinichenko/develop

Fixed an error "type mismatch;  found   : org.joda.time.LocalTime  requi...
Optimized construction of SQLSyntax
Optimized method calls
Removed a unnecessary type parameter
Added methods for LocalDateTime
Merge pull request #198 from kxbmap/optimizations

Few optimizations
Merge pull request #199 from kxbmap/add-localdatetime-methods

Added methods for LocalDateTime
version 1.7.4
Merge branch 'release/1.7.4'