add puma to Gemfile
update readme
fix badge url
Merge branch 'feature/puma' of github.com:skv-headless/task_manager into feature/more_tests

* 'feature/puma' of github.com:skv-headless/task_manager:
  update readme
  add puma to Gemfile

Conflicts:
	README.md
Sign Up failure test
stories tests
only in rutes
replace get session special route
remove session create special route
session rest remove
build travis from develop
develop coverage
merge feature/coverall to develop
remove ability to update comment
a little test improvements
simple form
first simple form
user form, simple form boostrap config
comment form
Merge branch 'feature/simple_form' into develop

* feature/simple_form:
  comment form
  user form, simple form boostrap config
  first simple form
  simple form