Merge tag '1.0.2' into develop

V 1.0.2
Implemented virtual fields
Validation and custom validation support on property set
Added message in validators
Added validators section in README
Merge branch 'develop' of github.com:3logic/apollo into develop
Validators named to rule
Check valid default format in schemer
Version 1.0.3

Changelog added
Merge branch 'release/1.0.3'