feat text-fields: fixed label and valid input state
chore demo: fixed label and valid input state examples
feat text-fields: dynamic value management for fixed label and valid state

Fixed label and valid input state parameters can now be set to true of
false.
chore demo : demo updated with dynamic value

Text fields demo updated with dynamic management for is-valid parameter
and fixed-label parameter.
feat text-fields: add default values for parameters

The configuration's parameters of the directives needed a value `true` to be active.
By adding a default value, if the parameters is set to no value (for example :
`is-valid` instead of `is-valid="VALUE"`) the default value is true.
Merge pull request #13 from lumapps/feat/text-fields

feat text-fields: fixed label and valid input state
fix notification: remove circular dependency between $compile & ui-router

$compile is dependent on $http. ui-router is also dependent on $http. By creating a
controller managed by ui-router and depending on LxNotificationService, a circular
dependency was created.
Fixed by using $injector in LxNoticiationService.
feat colors: add theme global colors and colors classes

Settings include now global themes color with primary colors and accent
colors based on http://www.google.com/design/spec/style/color.html .
There are also background colors classes and text colors classes.
chore demo: updated global CSS with new colors classes and theme
Merge pull request #15 from lumapps/feat/colors

feat colors: add theme global colors and colors classes
refactor dropdown: remove useless code
fix select: change width attribute

According to dropdown refactor, full-width attribute has changed to
width attribute.
Merge pull request #16 from lumapps/fix/dropdown

refactor dropdown: remove useless code
feat tabs: add color themes

Indicator, active bar and ripple colors can be changed.
chore demo : add color themes on tabs + fix color

Colors themes example on tabs feature and fix colors for link examples.
feat tabs: add scope variables and dark/light theme

Colors are now defined with scope variables. Colors managed with a
light an dark theme, following google specifications :
http://www.google.com/design/spec/components/tabs.html
chore demo: tabs demo updated with themes and colors
feat tabs: change default theme and parameter name
chore demo: tabs demo updated with renamed parameter and theme
chore demo: add a background color to a tab demo