MagnetoDB API: preparations for 'scan'
Structure of tempest directory changed.
Smoke tests for Table and Item entities implemented.
Code cleanup done.
Load test refactored.
Merge pull request #48 from yyekovenko/master

Refactored tempest and load tests.
Merge pull request #46 from ikhudoshyn/api-scan

MagnetoDB API: preparations for 'scan'