Merge pull request #74 from bhirt-bpl/master

Minor updates to stepper cell, date cell & slider cell
Remove test target from XLForm project. A new test project will be added.
Travis CI added.
New XLForm Test project.
Merge pull request #79 from xmartlabs/travis

Travis CI added.
Added travis-ci status to readme.
Fixed default date not set in date picker
Popover support implemented.
Merge pull request #82 from jschmid/fix-datepicker

Fixed default date not set in date picker
Merge pull request #84 from HiTask/master

Popover support implemented.
-XLFormRowDescriptorTypeMultipleSelectorPopover, XLFormRowDescriptorTypeSelectorPopover added. 
-Migrated to Universal project, now we can run the examples on an iPad. 
-Added new row types examples.
Merge pull request #85 from xmartlabs/PopoverControllerSupport

iPad popoverController selector added.
buttoncell not selectable on disable
Merge pull request #87 from mobiquity-networks/button_disabled

buttoncell not selectable on disable
XLFormRowDescriptorTypeInfo row added. 
Update example app showing the new row type.
Merge branch 'master' of github.com:xmartlabs/XLForm
Merge pull request #92 from xmartlabs/infoRow

XLFormRowDescriptorTypeInfo row added.
Added XLFormValidator, base clase for validators, it performs XLFormValidatorProtocol.
+emailValidator convenience method added. It returns a XLFormRegexValidator instance set up accordingly. 
Email validator is shown in Text Fields example.
Merge branch 'master' of github.com:xmartlabs/XLForm into emailValidatorConvenienceMethod
Merge pull request #93 from xmartlabs/emailValidatorConvenienceMethod

Email validator convenience method
UICustomization example added.
Update readme.