Added PID file configuring and creation

v0.1.2

Added PID file creation; Updated README; Done some code cleanup.

Fixed bug with cut off of ZIP parts on some EWS

Enforced ZIP parts encryption to prevent discovering of attachment type

Attachments splitting introduced

• Added possibility to limit Email size and splitting it to several parts.
• Fixed bug when several emails are processed at once.
• Version increased: 0.0.4 -> 0.1.0

The first release ready to test

Includes all the features needed to setup full-functioning email bridge between 2 hosts that use EWS servers.