Added expressions parser
Merged DataTypeHelper
Added expression parser, analyzer, interpret and unit tests.
Merge branch 'master' of https://github.com/xhonzyn/LogAnalyzer into xhonzyn-master

Conflicts:
	src/loganalyzer/datatypes/DataDateTime.java
	src/loganalyzer/datatypes/DataInteger.java
	src/loganalyzer/datatypes/DataString.java