branch for IMAGING-120 refactoring

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/imaging/branches/IMAGING-120@1537255 13f79535-47bb-0310-9956-ffa450edef68
branch for IMAGING-120 refactoring

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/imaging/branches/IMAGING-120@1537257 13f79535-47bb-0310-9956-ffa450edef68
rename ImageFormat enum to ImageFormats

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/imaging/branches/IMAGING-120@1537262 13f79535-47bb-0310-9956-ffa450edef68
extract ImageFormat interface from ImageFormats enum

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/imaging/branches/IMAGING-120@1537328 13f79535-47bb-0310-9956-ffa450edef68
[IMAGING-120] Extract interface from ImageFormat; specifically, converted 'ImageFormat' as the interface name with the enumerated instances in 'ImageFormats'

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/imaging/trunk@1537329 13f79535-47bb-0310-9956-ffa450edef68