New string functions
minor version 1.1.5, relase date 2017-01-31
New functions were introduces
- trim - remove leading and trailing whitespace
- replace - replace substring by with another string
- substring - returns substring from given position
- toLowerCase - converts input to lower case
- toUpperCase - converts input to upper case
- startsWith - returns true if input strings starts with given prefix
- endsWith - returns true if input string ends with given suffix
- contains - returns true if input string contains given substring
- md5 - returns md5 hash of input
- sha1 - returns sha1 hash of input