[enhance] add a link to signature
[feature] add signature to reply emails
[workaround]fix MailCore for iOS SDK 8.1
[fix] fix template engine bug
[fix] use latest MailCore for the SDK 8.1 support
[fix] template engine bug
add signature template
animation bug fixed
add calendar icon and corresponding interface
[fix]update MailCore version
Merge branch 'dev' of github.com:ninjaatif/idealab_client into dev
[enhance] construct plain text signature
[feature]add and show signature when replying from one-click button
[feature] add signature for forwarding email & refactor
[Feature] Add library to support calendar

Updated the Pod file. Installed necessary libraries.
Revert 115eac4..b22a40f

This rolls back to commit 115eac456ee131a3c158e2063723117163442e25.
fold and unfold recipient views
Merge branch 'dev' of github.com:ninjaatif/idealab_client into dev
ui bug fixed
update home conversation cell paging animation