Implemented RegisterActivity

Implemented RegisterActivity.  Also implemented validation of EditText
entered.  Haven't not implement the actual register action.
Update LoginActivity
Update MainActivity
Change Overall App Styles
Add id for vendor class
Add VendorAdminAccountActivity(haven't implement yet)
Remove Activity Title Bar
Update MenuItem

Update MenuItem
Added comments to RegisterActivity
...
Add Vendor Edit Activity

Update VendorAdminAccountActivity
Add default no_image image
Add VendorEditActivity
Add pictureURL to Vendor and MenuItem
Update VendorActivity to include picture
Added filenames to ignore
Merge pull request #1 from zengshengliu/ZengBranch

Zeng branch
Merge pull request #2 from zengshengliu/edgar

Added filenames to ignore
Added Cart, Order and Special Offers
Merge branch 'Mark'