Added InteropDotNet support
Added additional unit tests and made all Interop related functionality internal.
Fixed regression introduced in last commit

Interop interfaces and Library loader must be public.
Merge branch 'feature/mono-support' into develop
Back ported setvariable fix from 3.03 to dev (Issues #120 and #68)
Backported multi-page tiff support from dev_3.03.
Changed trace source to "Tesseract" and updated change log.
Fixed getversion by just returning a constant for now.
Merge branch 'release/2.0.0'
Merge branch 'release/2.0.0' into develop
add possibility to create a Pix from an in memory Tiff file
Merge pull request #122 from etishor/read-from-memory

add possibility to create a Pix from an in memory Tiff file
Support for loading config files (workaround for issues #125 & #70)
Verify preconditions for Pix.ConvertRGBToGray (Issue #127)
Merge branch 'master' into develop
saving files before refreshing lineendings
Removed Thumbs.db cache file
Merge branch 'release/2.1'
Add null handle checking in PageIterator Fixed #142