OCR Automation v1.2.5

Implemented new features and fixing bugs:

• Added a step where default ocr errors can be replaced (see #53)
• Added a step for removing artifacts on PDF befor doing OCR (see #47)
• Steps for adding just metadata or reading OCR from PDF (see #50 #49)
• More advances cotrolls for applying the selected crop box to different pages (see #34 #45)
• Fix #54 #48 #46 #42

Full Changelog: v1.2.0...v1.2.5