Complete Excel Parser
Merge https://github.com/gokulvanan/SimpleParser

Conflicts:
	src/main/java/org/simple/parser/Main.java
	src/main/java/org/simple/parser/core/ColumnDef.java
	src/main/java/org/simple/parser/core/FileParser.java
	src/main/java/org/simple/parser/core/ParserBean.java
	src/main/java/org/simple/parser/exceptions/SimpleParserException.java
	src/main/java/org/simple/parser/samples/ExcelParser.java
	src/test/java/org/simple/parser/ParsingTest.java
	src/test/java/org/simple/parser/SampleModel.java