WIP: Languages Support

Working on adding language support. 

### To do:

**UI:**
- [x] Login
- [x] Forgot Password
- [x] Reset Password
- [x] Dashboard
- [x] Project
  - [x] Add
  - [x] Edit
  - [x] View
- [x] Users
  - [x] Add
  - [x] Edit
  - [x] Edit Profile
  - [x] View
- [x] Settings
- [x] Builds
  - [x] List
  - [x] View
- [x] Plugins

**Command Line Tools:**
- [x] Install
- [x] Update
- [x] Poll
- [x] Create Admin
- [x] Run Builds
- [x] Builder
  - [x] Build Plugins

**Languages**
- [x] English 
- [ ] Polish (Provided by @lechus)
- [ ] German (Provided by @thormeier)
- [ ] Dutch (Provided by @tvbeek)
- [ ] Italian (Provided by @mavimo)
- [ ] Russian (Provided by @corpsee, @xboston, @ViGo5190)
- [ ] French (Looking for volunteers)
- [ ] Spanish (Looking for volunteers)
- [ ] Chinese (Looking for volunteers)
- [ ] Japanese (Looking for volunteers)
Maybe it is nice to iterate all the possible languages and not only the first one.
My browser send:
Accept-Language: nl,en-us;q=0.7,en;q=0.3