Support for Phone UI

This pull is an update to the current ui in order to support android devices with phone-like screen size and density ( 320dp <= x <= 540dp).
All screenshots were taken from a nexus 4 device, running stock android 4.4.2 .

## Portrait orientation:
### Flight Screen

![portrait_flight_screen](https://f.cloud.github.com/assets/914968/2026604/2dc8e932-8899-11e3-815d-3127db00a254.png)
![portrait_flight_screen2](https://f.cloud.github.com/assets/914968/2026605/329c8400-8899-11e3-9225-1d9fa6f51133.png)
![portrait_flight_expanded_telem_screen](https://f.cloud.github.com/assets/914968/2026611/4aef7e68-8899-11e3-8b43-99deb05a84d1.png)
![portrait_flight_expanded_modes_screen](https://f.cloud.github.com/assets/914968/2026612/4e8ea9c2-8899-11e3-953d-46b933fd0bb1.png)


### Editor Screen

![portrait_editor_screen](https://f.cloud.github.com/assets/914968/2026621/90852a7c-8899-11e3-9905-02b840d948ab.png)
![portrait_editor_screen2](https://f.cloud.github.com/assets/914968/2026622/9375bf4e-8899-11e3-90f3-13ae8845af46.png)
![portrait_editor_mission_detail_screen](https://f.cloud.github.com/assets/914968/2026625/9811a446-8899-11e3-9760-f4efe9b39e7e.png)


### Drone Setup Screen

![portrait_setup_tuning_screen](https://f.cloud.github.com/assets/914968/2026632/bb60542e-8899-11e3-8f52-f43614839e65.png)
![portrait_setup_servo_function_screen](https://f.cloud.github.com/assets/914968/2026635/c2990d26-8899-11e3-90e8-00635b50bd42.png)
![portrait_setup_radio_channel_screen](https://f.cloud.github.com/assets/914968/2026637/c6528406-8899-11e3-9f57-917d7221c446.png)
![portrait_setup_flight_mode_screen](https://f.cloud.github.com/assets/914968/2026639/cc68452e-8899-11e3-9c7d-e4b339c5ff3c.png)
![portrait_setup_channel_options_screen](https://f.cloud.github.com/assets/914968/2026642/d172b13a-8899-11e3-9af7-0126e466a3ba.png)
![portrait_setup_imu_calibration_screen](https://f.cloud.github.com/assets/914968/2026645/d881c4ca-8899-11e3-9739-9feb0682928d.png)
![portrait_setup_checklist_screen](https://f.cloud.github.com/assets/914968/2026647/dcf51494-8899-11e3-814d-48cb4f54d95b.png)
![portrait_setup_params_screen](https://f.cloud.github.com/assets/914968/2026649/e225137e-8899-11e3-89a9-0fb15a02e735.png)


## Landscape Orientation

### Flight Screen
![landscape_flight_screen](https://f.cloud.github.com/assets/914968/2026659/101b85e2-889a-11e3-8f98-3ef079102aa5.png)
![landscape_flight_expanded_telem_screen](https://f.cloud.github.com/assets/914968/2026660/136f1f10-889a-11e3-8e09-942fa4125aac.png)
![landscape_flight_expanded_modes_screen](https://f.cloud.github.com/assets/914968/2026662/162b549e-889a-11e3-9047-6f261c605195.png)

### Editor Screen
![landscape_editor_screen](https://f.cloud.github.com/assets/914968/2026664/1e2f9d6c-889a-11e3-882f-a45c5dbdb1e9.png)
![landscape_editor_screen2](https://f.cloud.github.com/assets/914968/2026665/2095a10a-889a-11e3-91cf-74743f93cda3.png)
![landscape_editor_mission_detail_screen](https://f.cloud.github.com/assets/914968/2026667/24bad8f4-889a-11e3-8385-0376180c0637.png)

### Drone Setup Screen
![landscape_setup_tuning_screen](https://f.cloud.github.com/assets/914968/2026675/555f40e4-889a-11e3-9f6a-e3fe798fa580.png)
![landscape_setup_servo_function_screen](https://f.cloud.github.com/assets/914968/2026676/57de1afc-889a-11e3-9ae7-1528ac264746.png)
![landscape_setup_radio_channel_screen](https://f.cloud.github.com/assets/914968/2026677/5c3cb7de-889a-11e3-867b-72ef725fd94d.png)
![landscape_setup_flight_mode_screen](https://f.cloud.github.com/assets/914968/2026679/61d2b9c8-889a-11e3-9cce-58087662b23c.png)
![landscape_setup_channel_options_screen](https://f.cloud.github.com/assets/914968/2026681/65a98518-889a-11e3-9ae6-853ae66b8839.png)
![landscape_setup_imu_calibration_screen](https://f.cloud.github.com/assets/914968/2026684/6f1c5846-889a-11e3-8c9c-7a99e1fa864f.png)
![landscape_setup_checklist_screen](https://f.cloud.github.com/assets/914968/2026685/738174e8-889a-11e3-805b-958a126ae834.png)
![landscape_setup_params_screen](https://f.cloud.github.com/assets/914968/2026686/76afe58c-889a-11e3-9f2e-68a8e9b78021.png)