Merge pull request #4 from mitesh-mutha/master

Solved the issue 1
added sqlite gem in gemfile
Test 4 added
Added test for crawler
updated gemfile
Corrected migrations
Test 4 complete(1)
Test 4 complete
Test 4 complete(2)
Merge pull request #5 from karthiksenthil/master

Made form in / path
Done with url_manipulator
Merge branch 'master' of https://github.com/vikassy/search_engine
Done with passing the test of url_manipulator
Made word.rb
corrected path word.rb
Done with word class