Emancipate yourself from complexity

• Add: per-file vars for javascript replacements
• Add: Option for backup file (-b)
• Add: More safe life for data (data never only in memory as default)
• Add: Option for sync file interaction
• Add: Option to output matched groups (-m)
• Breaking: Removed -J flag (use -j flag instead)
• Breaking: Removed -O flag (use -m flag instead)
• Fix: Newline in replacement