Header yaml struct (#18)

* create master templates for gnuplot elevation profiles

* add migration proceedure for stripping elevation.plt

* serialize header yaml struct

pkg/activity/header.go

@@ -0,0 +1,51 @@
+package activity
+
+type Header struct {
+	Meta     HeaderMeta     `yaml:"meta"`
+	Activity HeaderActivity `yaml:"activity"`
+	Layout   Layout         `yaml:"layout"`
+	Stats    Stats          `yaml:"stats"`
+}
+
+type HeaderMeta struct {
+	Version string `yaml:"version,omitempty"`
+}
+
+type HeaderActivity struct {
+	Wandern       bool          `yaml:"wandern,omitempty"`
+	Type          string        `yaml:"type"`
+	Date          string        `yaml:"date"`
+	Title         string        `yaml:"title"`
+	PointOfOrigin PointOfOrigin `yaml:"pointOfOrigin"`
+	Season        string        `yaml:"season"`
+	Rating        string        `yaml:"rating"`
+	Company       string        `yaml:"company"`
+	Restaurant    string        `yaml:"restaurant"`
+	MaxElevation  string        `yaml:"maxElevation"`
+}
+
+type PointOfOrigin struct {
+	Name   string `yaml:"name"`
+	Qr     string `yaml:"qr"`
+	Region string `yaml:"region"`
+}
+
+type Stats struct {
+	Ascent      string `yaml:"ascent"`
+	Distance    string `yaml:"distance"`
+	MovingTime  string `yaml:"movingTime"`
+	OverallTime string `yaml:"overallTime"`
+	StartTime   string `yaml:"startTime"`
+	SummitTime  string `yaml:"summitTime"`
+	Puls        string `yaml:"puls,omitempty"`
+}
+
+type Layout struct {
+	HeadElevationProfile        bool    `yaml:"headElevationProfile"`
+	ElevationProfileType        string  `yaml:"elevationProfileType,omitempty"`
+	ElevationProfileRightMargin float32 `yaml:"elevationProfileRightMargin"`
+	TableSize                   float32 `yaml:"tableSize"`
+	MapSize                     float32 `yaml:"mapSize"`
+	MapHeight                   int     `yaml:"mapHeight"`
+	Linespread                  float32 `yaml:"linespread"`
+}