minor
adding new standard functions

- parse string to int/double
- find and replace regex in string
adding new standard predicates

- string not empty check
- string matching (regex, prefix, suffix)
- logical functions on predicates (not, and, or, xor)
gitignore for eclipse metadata
add predicate expression builder

- predicate expressions with AND and OR
- operator precedence: AND > OR
fixing warnings
add new standard function

- trim strings
Merge branch 'master' into MiK

Conflicts:
	.gitignore
Merge pull request #1 from local-ch/MiK

new standard predicates and functions