Replace main license file.
Replace license on taiga.domains module.
Replace license on taiga.events module.
Replace license on taiga.projects.aggregates module.
Replace license on taiga.projects.tasks module.
Replace license on taiga.projecrs.issues module.
Replace license on taiga.projects.userstories module.
Replace license on taiga.projects.wiki module.
Replace license on taiga.projects module.
Replace license on taiga main module.
Some Apache license references removed
Merge pull request #34 from taigaio/license

License