Create polls (#1452)

* add AddPollDialog

* add support for pleroma poll options

* add PollPreviewView

* add Poll support to drafts

* add license header, cleanup

* rename drawable files to correct size

* fix tests

* fix bug with Poll having wrong duration after delete&redraft

* add input validation

* grey out poll button when its disabled

* code cleanup & small improvements

app/src/main/java/com/keylesspalace/tusky/entity/NewStatus.kt

@@ -0,0 +1,37 @@
+/* Copyright 2019 Tusky Contributors
+ *
+ * This file is a part of Tusky.
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tusky; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+package com.keylesspalace.tusky.entity
+
+import android.os.Parcelable
+import com.google.gson.annotations.SerializedName
+import kotlinx.android.parcel.Parcelize
+
+data class NewStatus(
+        val status: String,
+        @SerializedName("spoiler_text") val warningText: String,
+        @SerializedName("in_reply_to_id") val inReplyToId: String?,
+        val visibility: String,
+        val sensitive: Boolean,
+        @SerializedName("media_ids") val mediaIds: List<String>?,
+        val poll: NewPoll?
+)
+
+@Parcelize
+data class NewPoll(
+        val options: List<String>,
+        @SerializedName("expires_in") val expiresIn: Int,
+        val multiple: Boolean
+): Parcelable