Change process method inside TesseractEngine

The old method did not pass the region parameter properly down to subsequent process methods
Merge pull request #89 from wwd7086/patch-1

Change process method inside TesseractEngine
Added note for contributors
Merge branch 'release/1.11'
Merge branch 'release/1.0.12'
Merge branch 'release/2.0.0'
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
Merge branch 'master' into develop
saving files before refreshing lineendings