Added sketch implementation
Profiling of iterator open/reset/close
Added sketch eval profiling
Reasonably working profiling of eval
Removed header/footer from inner profile
Refactoring/fixed extra next call
Added extra information. Exteded iterator printers
Removed debug code
Removed debug code
Added/fixed tests
Fixed eval in non-profiling cases
Polishing
Polishing
Added missing test files
Addressed review comments
Fixed typo
Merge pull request #79 from 28msec/feature-profile-open-close-reset-review-comments

Addressed review comments
Addressed review comment
Merge pull request #78 from 28msec/feature-eval-profiling

Profiling of expressions evaluated through eval
Merge pull request #76 from 28msec/feature-profile-open-close-reset

Profiling of iterator open/reset/close