URBNG-35: Added UserTasks table and many modifications

Changes:
* added 'geodistance' function to database
* many tables have new columns
* added new h2 database file for test propose
* some other smaller modifications
URBNG-35: Added table 'GPSTasks' and 'ABCTasks'.

WebApi tests are using second database file: 'urbangameApi.h2.db'.
Merge branch 'web' of git://github.com/angieo/UrbanGame into angieo-web

Conflicts:
	conf/evolutions/default/1.sql
	database/urbangame.h2.db
Merge branch 'web' of git://github.com/angieo/UrbanGame into angieo-web

Conflicts:
	database/urbangame.h2.db
Merging angieo branch with mine.
URBNG-35 Added task solution sending.

It looks like most of basic WebApi methods are implemented.
Now it needs testing.

I didn't write unit test yet, because there is to many cases and I don't
have much time for this at the moment.

Also FrontEnd should fill new tables with proper data.

TODO:
* tell others how should they use WebApi
* implement tasks dependencies
* test it in all scenario
* implement notifications
Fixed distance calculating using Haversine formula.
Added internationalization for error messages.
Merge pull request #154 from angieo/web

[Web] URBNG-66 Login and authorization - password recovery + URBNG-77 Create new task - LightBox + CSS changes
Added missing 2.sql file with 'geodistance' function
Merge remote-tracking branch 'maciej/web' into web
Merge pull request #156 from mkaim/web

URBNG-35: Most functions of WebApi should be implemented now
Changes in tasks tables.
Added forgotten urbangameApi.h2.db file with filled tables.
Changed type of 'range' columns to integers.

From now on all distances will be calculating in meters.
Little corrections.
Removed "points" column from "UserGames" table.

From now on points are counted dynamically.
Added some unit test.
Removed 'geodistance' function.

Temporarily all distances between two gps points will be equal 0.

Other changes:
* small code refactorization
* added again 'points' column to 'UserGames' table
* removed file 2.sql
Fixed returned format of errors.