added some error handling determination logic
improved performance in service
allow empty serialNumber for equipement
fix order list and manage button
Merge branch 'master' into workorder-list-view-hotfix
fix serial number has to be unic
fix provider message drop down display
Merge pull request #58 from clintonhealthaccess/provider-both-hotfix

fix provider message drop down display
Change in Department, Manufacturer and Supplier drop box for performance issue
Casting bug fixed
Merge branch 'master' into spare-part-module
Unnecessary comments removed
merge with latest version
Merge branch 'spare-part-module' of github.com:clintonhealthaccess/memms into spare-part-module
code cleaning