Add folders for all mobile operating systems targeted
[Dev] Add Main Activity
[Dev] Add Main Activity
[Dev] Add external libs to use and update Strings.xml
[Dev] Implement overall app layout.

 [Todo]
 - Add dynamic tabs
 - Fix sliding effect for fragments tabs
[Dev] Add remaining fragment tabs sections
[Cleanup] Reformat Code
[Dev] Add remaining fragment tabs sections
[Dev] Add ACRA lib for crash reporting
[Enhancement] Entirely rewrote the app using Navigation-drawer-page-sliding-tab-strip (https://github.com/Balaji-K13/Navigation-drawer-page-sliding-tab-strip), based on:
- ActionBarSherlock (https://github.com/JakeWharton/ActionBarSherlock)
- nested-fragments (https://github.com/marsucsb/nested-fragments)
- PagerSlidingTabStrip (https://github.com/astuetz/PagerSlidingTabStrip)
- NavigationDrawer (http://developer.android.com/training/implementing-navigation/nav-drawer.html)
- Latest Support v4 library

Works much better now, as I'm now able to update nested fragments views. And this also has a much user-friendly navigation UI
[Enhancement] Display "No Data" if concrete fragment implementations return no view
[Fix] Add skeleton for tiles management

Tiles are embedded in a table n rows x 1 streched column, which comes embedded in a ScrollView
[Enhancement] Add Router State tile
Add remaining tiles for "Status > Router" tab
[Fix] Fix tab content being positioned over the previous tab content
Add main activity
[Dev] Start filling main activity tiles
[Dev]Add "Auto-refresh toggle" to main activity tiles
[Enhancement] Update "Auto-refresh toggle" in main activity tiles
[Dev] Add Router Space Usage Tile
[Clean-up] Clean-up & Reformat Code
[Enhancement] Update "Auto-refresh toggle" in main activity tiles
[Dev] Add Router Space Usage Tile
[Clean-up] Clean-up & Reformat Code
Merge remote-tracking branch 'origin/master'

Conflicts:
	android/app/src/main/java/org/lemra/dd_wrt/tiles/DDWRTTile.java
	android/app/src/main/java/org/lemra/dd_wrt/tiles/status/router/StatusRouterCPUTile.java
	android/app/src/main/java/org/lemra/dd_wrt/tiles/status/router/StatusRouterMemoryTile.java
	android/app/src/main/java/org/lemra/dd_wrt/tiles/status/router/StatusRouterStateTile.java
	android/app/src/main/java/org/lemra/dd_wrt/tiles/status/wan/WANConfigTile.java
	android/app/src/main/res/layout/tile_status_router_router_cpu.xml
	android/app/src/main/res/layout/tile_status_router_router_mem.xml
	android/app/src/main/res/layout/tile_status_router_router_space_usage.xml
	android/app/src/main/res/layout/tile_status_router_router_state.xml
[Enhancement] Update "Auto-refresh toggle" in main activity tiles
[Dev] Add Router Space Usage Tile
[Clean-up] Clean-up & Reformat Code
[Dev] Fill "Status > WAN > Config" and add "Status > WAN > Traffic" tile skeleton