Merge pull request #127 from GunpreetAhuja/dirty

Transport and vehicle
Order filtered with PurchaseOrder
adds dependent fields in PurchasedItem
Merge pull request #137 from kamalpreetgrewal/dirty

adds dependent fields in PurchasedItem
Merge remote-tracking branch 'upstream/dirty' into dirty
enhances the form fields of PurchasedItem
Merge pull request #139 from kamalpreetgrewal/dirty

enhances the form fields of PurchasedItem
Operational error removed.
Merge pull request #141 from jasvir99/dirty

Operational error removed.
simplejson added in requirement list.
Merge pull request #138 from saloni10/dirty

Order Filtered with Purchase order in Search
Verbose_name updated for Admin interface
Merge pull request #143 from KamalKaur/dirty

Verbose_name updated for Admin interface
adds filtering to lab report
admin.py modified
removing static nature of bills
Merge pull request #144 from bhattigurjot/dirty

adds filtering to lab report
corrects the filter query in labreport form
Merge pull request #145 from aashitadutta/dirty

admin.py modified
Merge pull request #150 from aashitadutta/libre---0.1

Removing static nature of bills