sqlite handle: Initial implementation

Change-Id: I4d6dfaa5d52a3ab955aefa21d7b330cff7c68be6
read-echo: functions to read data from repo

Change-Id: I61a0b8bf254cd84c49def0f7ddda5ab026c689f4
helpers: RepoCommandParameter and RepoCommandResponse data structures

Change-Id: I9809e44b8216b026468fbf33265eff3009d87404
write-echo: Implementation of insert and insert check

Change-Id: Ife53fcebe52c99252e418a46d7361bae8e638bdf
delete-echo: Implementatation of delete

Change-Id: Ib971e9ed8db412dae86d07f87e168dea11f51b0b
server: add read configuration file function

Change-Id: I6a3fe8208219a18e0a67b791dedb6b93d5e9caab
tests: Adding basic integrated test for Insert/Delete/Read operations

Change-Id: Iea6f1a5c3e507a0534eead476bef0c38b4af44ce