Increased weight limit (from 200 kg to 500 kg). Fixes issue #21

Also changed implementation of exercise/image download from wger: if a downloaded exercise refers to an image that already exists, the exercise is considered to be duplicate.
Its download will be skipped.
Merge branches 'training-timer' and 'master' into training-timer
Implemented a first, simple recovery timer. It uses the notification bar, vibration and sound.

Still misssing: handling recovery times between sets, I18N and preferences(enable/disable sound, vibration, change durations and sound).
Merge pull request #24 from rolandgeider/master

Simplify exercise import by filtering via API
Italian Translation

FIX
Merge pull request #25 from thypon/master

Italian Translation
Recovery timer for exercises is now working (before only the set timer worked).

Also added preferences for training timer and I18N.
Reordered some preferences in the SettingsActivity.

The most important preferences are the new training-timer preferences. That's why I put them first.
Merge branch 'master' of github.com:chaosbastler/opentraining into training-timer
Bugfix for training-timer preferences.
Merge branch 'training-timer'
Added credits for the italian translation by Andrea Brancaleoni (https://github.com/thypon).
Added changelog message.
Bugfix FExListActivity: state was not properly restored after screen rotation.
Merge branch 'translation' into training-timer
Bugfix: RecoveryTimer will now be stopped, when the last exercise of a workout is finished.
Also updated the changelog.

A better solution might be not to stop the RecoveryTimer but to prevent the timer start.
Preparing release v0.6
Merge branch 'training-timer'
Implemented a new navigation activity (the activity the user starts at).

The background image is still missing.
Implemented a new navigation activity (the activity the user starts at).