V5: Add support for replacing text ranges and sections using replace operation

[artembatura]

Readme changes

• Use downloads per week badge instead of per month
• Remove total downloads badge
• Update examples with ReplaceOperation

Internal changes

• Remove Operation static class.
• • Move operations apply logic directly to operations.
• • Move operations serialization and deserialization logic directly to operations.
• • Move fill constants logic to utility function fillConstantsInString.
• Implement TextRange, TextLinesRange, TextSection and TextLinesSection classes.
• Implement AbstractSerializable abstract class. The inherited class must implement toSerializable method and SERIALIZABLE_CLASS property (string).
• AbstractOperation now doesn't require implement getSerializableProperties and getTextProperties methods. Instead now you should new apply methods and derived from AbstractSerializable - toSerializable method.
• Add tests for ReplaceOperation.

Public changes

• ReplaceOperation now support replacing text ranges and line ranges by passing range class instance to searchValue argument.