Update the following group id to global info
2141 (harvest)
2091 (organic_matter)
2101 (mulch)
2111 (chemicals)
Match changes from online version 6/4/2013
1. Add handling for group id 5046;
2. Add handling for alias for some variables (Code_synon column of ICASA master variable list)
Update handling for alias of some variable to support multiple aliases
Update handling for alias of some variable to support auto-insert into correct location with real variable name
up tp date 07/17/2013
Change setGroupMatch to public method
Add handling for unregistered variable to get meaningful path
Update the handling for reading the titles in the lookup code spreadsheet
Change the name of csv file to avoid conflict with ACE-Core
Merge pull request #5 from MengZhang/develop

Develop pull request from Meng